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66000000000000 = 213351211

66000000000000 has 728 divisors, whose sum is σ = 239985351365904. Its totient is φ = 16000000000000.

The previous prime is 65999999999933. The next prime is 66000000000037. The reversal of 66000000000000 is 66.

Adding to 66000000000000 its reverse (66), we get a palindrome (66000000000066).

66000000000000 divided by its reverse (66) gives a 12-th power (1000000000000 = 1012).

It can be divided in two parts, 6 and 6000000000000, that multiplied together give a square (36000000000000 = 60000002).

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 10.

It is an unprimeable number.

It is a polite number, since it can be written in 51 ways as a sum of consecutive naturals, for example, 5999999999995 + ... + 6000000000005.

Almost surely, 266000000000000 is an apocalyptic number.

66000000000000 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 66000000000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119992675682952).

66000000000000 is an abundant number, since it is smaller than the sum of its proper divisors (173985351365904).

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

66000000000000 is an frugal number, since it uses more digits than its factorization.

66000000000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100 (or 21 counting only the distinct ones).

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

The spelling of 66000000000000 in words is "sixty-six trillion", and thus it is an aban number, an eban number, and an uban number.