64392664 has 24 divisors (see below), whose sum is σ = 140449140. Its totient is φ = 27596688.

The previous prime is 64392649. The next prime is 64392667. The reversal of 64392664 is 46629346.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64392667) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 81742 + ... + 82525.

Almost surely, 2^64392664 is an apocalyptic number.

It is an amenable number.

64392664 is an abundant number, since it is smaller than the sum of its proper divisors (76056476).

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

64392664 is a wasteful number, since it uses less digits than its factorization.

64392664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164287 (or 164276 counting only the distinct ones).

The product of its digits is 186624, while the sum is 40.

The square root of 64392664 is about 8024.5039722091. The cubic root of 64392664 is about 400.8163826648.

It can be divided in two parts, 64392 and 664, that added together give a palindrome (65056).

The spelling of 64392664 in words is "sixty-four million, three hundred ninety-two thousand, six hundred sixty-four".