665796900 has 36 divisors (see below), whose sum is σ = 1926373232. Its totient is φ = 177545760.

The previous prime is 665796899. The next prime is 665796919. The reversal of 665796900 is 9697566.

It is a super-2 number, since 2×665796900² = 886571024099220000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 665796900.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1109362 + ... + 1109961.

Almost surely, 2^665796900 is an apocalyptic number.

665796900 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

665796900 is an abundant number, since it is smaller than the sum of its proper divisors (1260576332).

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

665796900 is a wasteful number, since it uses less digits than its factorization.

665796900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2219340 (or 2219333 counting only the distinct ones).

The product of its (nonzero) digits is 612360, while the sum is 48.

The square root of 665796900 is about 25803.0405185125. The cubic root of 665796900 is about 873.2003938174.

The spelling of 665796900 in words is "six hundred sixty-five million, seven hundred ninety-six thousand, nine hundred".