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BaseRepresentation
bin1111101111000…
…1010010000000
311121012010222110
43323301102000
5113344000000
610314335320
71430663553
oct373612200
9147163873
1066000000
1134289860
121a12a540
131089ac71
148aa069a
155bda850
hex3ef1480

66000000 has 224 divisors, whose sum is σ = 239059440. Its totient is φ = 16000000.

The previous prime is 65999993. The next prime is 66000007. The reversal of 66000000 is 66.

Adding to 66000000 its reverse (66), we get a palindrome (66000066).

Multipling 66000000 by its reverse (66), we get a square (4356000000 = 660002).

66000000 divided by its reverse (66) gives a 6-th power (1000000 = 106).

It can be divided in two parts, 6 and 6000000, that multiplied together give a square (36000000 = 60002).

It is an interprime number because it is at equal distance from previous prime (65999993) and next prime (66000007).

It is a hoax number, since the sum of its digits (12) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a nialpdrome in base 10.

It is a zygodrome in base 5 and base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 66000000.

It is not an unprimeable number, because it can be changed into a prime (66000007) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 5999995 + ... + 6000005.

Almost surely, 266000000 is an apocalyptic number.

66000000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119529720).

66000000 is an abundant number, since it is smaller than the sum of its proper divisors (173059440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66000000 is an frugal number, since it uses more digits than its factorization.

66000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58 (or 21 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 66000000 is about 8124.0384046360. The cubic root of 66000000 is about 404.1240020622.

The spelling of 66000000 in words is "sixty-six million", and thus it is an aban number, an eban number, and an uban number.