664387930428 has 24 divisors (see below), whose sum is σ = 1631830005120. Its totient is φ = 209806714800.

The previous prime is 664387930417. The next prime is 664387930433. The reversal of 664387930428 is 824039783466.

It is a super-2 number, since 2×664387930428² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1456990848 + ... + 1456991303.

It is an arithmetic number, because the mean of its divisors is an integer number (67992916880).

Almost surely, 2^664387930428 is an apocalyptic number.

It is an amenable number.

664387930428 is an abundant number, since it is smaller than the sum of its proper divisors (967442074692).

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

664387930428 is a wasteful number, since it uses less digits than its factorization.

664387930428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2913982177 (or 2913982175 counting only the distinct ones).

The product of its (nonzero) digits is 41803776, while the sum is 60.

The spelling of 664387930428 in words is "six hundred sixty-four billion, three hundred eighty-seven million, nine hundred thirty thousand, four hundred twenty-eight".