668613900 has 36 divisors (see below), whose sum is σ = 1934523752. Its totient is φ = 178296960.

The previous prime is 668613899. The next prime is 668613917. The reversal of 668613900 is 9316866.

It is a happy number.

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, 1114057 + ... + 1114656.

Almost surely, 2^668613900 is an apocalyptic number.

668613900 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

668613900 is an abundant number, since it is smaller than the sum of its proper divisors (1265909852).

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

668613900 is a wasteful number, since it uses less digits than its factorization.

668613900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2228730 (or 2228723 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 668613900 is about 25857.5694913501. The cubic root of 668613900 is about 874.4301704850.

The spelling of 668613900 in words is "six hundred sixty-eight million, six hundred thirteen thousand, nine hundred".