64900866 has 16 divisors (see below), whose sum is σ = 137437344. Its totient is φ = 20361024.

The previous prime is 64900861. The next prime is 64900867. The reversal of 64900866 is 66800946.

It is not an unprimeable number, because it can be changed into a prime (64900861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318040 + ... + 318243.

It is an arithmetic number, because the mean of its divisors is an integer number (8589834).

Almost surely, 2^64900866 is an apocalyptic number.

64900866 is an abundant number, since it is smaller than the sum of its proper divisors (72536478).

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

64900866 is a wasteful number, since it uses less digits than its factorization.

64900866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636305.

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

The square root of 64900866 is about 8056.1073726707. The cubic root of 64900866 is about 401.8680664053.

The spelling of 64900866 in words is "sixty-four million, nine hundred thousand, eight hundred sixty-six".