64801664 has 16 divisors (see below), whose sum is σ = 129097320. Its totient is φ = 32400768.

The previous prime is 64801651. The next prime is 64801717. The reversal of 64801664 is 46610846.

64801664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253004 + ... + 253259.

Almost surely, 2^64801664 is an apocalyptic number.

64801664 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

64801664 is a deficient number, since it is larger than the sum of its proper divisors (64295656).

64801664 is an equidigital number, since it uses as much as digits as its factorization.

64801664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506277 (or 506265 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 64801664 is about 8049.9480743667. The cubic root of 64801664 is about 401.6632080953.

The spelling of 64801664 in words is "sixty-four million, eight hundred one thousand, six hundred sixty-four".