65668900 has 36 divisors (see below), whose sum is σ = 155458800. Its totient is φ = 23879200.

The previous prime is 65668891. The next prime is 65668901. The reversal of 65668900 is 986656.

It is not an unprimeable number, because it can be changed into a prime (65668901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28750 + ... + 30949.

It is an arithmetic number, because the mean of its divisors is an integer number (4318300).

Almost surely, 2^65668900 is an apocalyptic number.

It is an amenable number.

65668900 is an abundant number, since it is smaller than the sum of its proper divisors (89789900).

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

65668900 is a wasteful number, since it uses less digits than its factorization.

65668900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59724 (or 59717 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 65668900 is about 8103.6349868439. The cubic root of 65668900 is about 403.4470837024.

The spelling of 65668900 in words is "sixty-five million, six hundred sixty-eight thousand, nine hundred".