666666000 has 960 divisors, whose sum is σ = 3210794496. Its totient is φ = 124416000.

The previous prime is 666665983. The next prime is 666666019. The reversal of 666666000 is 666666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 191 ways as a sum of consecutive naturals, for example, 18017982 + ... + 18018018.

Almost surely, 2^666666000 is an apocalyptic number.

666666000 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 666666000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1605397248).

666666000 is an abundant number, since it is smaller than the sum of its proper divisors (2544128496).

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

666666000 is a wasteful number, since it uses less digits than its factorization.

666666000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 666666000 is about 25819.8760647684. The cubic root of 666666000 is about 873.5801735427.

666666000 divided by its reverse (666666) gives a cube (1000 = 10³).

It can be divided in two parts, 666 and 666000, that added together give a palindrome (666666).

The spelling of 666666000 in words is "six hundred sixty-six million, six hundred sixty-six thousand".