64668900 has 36 divisors (see below), whose sum is σ = 187109552. Its totient is φ = 17244960.

The previous prime is 64668889. The next prime is 64668911. The reversal of 64668900 is 986646.

It is an interprime number because it is at equal distance from previous prime (64668889) and next prime (64668911).

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

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, 107482 + ... + 108081.

Almost surely, 2^64668900 is an apocalyptic number.

64668900 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64668900 is an abundant number, since it is smaller than the sum of its proper divisors (122440652).

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

64668900 is a wasteful number, since it uses less digits than its factorization.

64668900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215580 (or 215573 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 64668900 is about 8041.6975819786. The cubic root of 64668900 is about 401.3887147654.

The spelling of 64668900 in words is "sixty-four million, six hundred sixty-eight thousand, nine hundred".