664560877432 has 8 divisors (see below), whose sum is σ = 1246051645200. Its totient is φ = 332280438712.

The previous prime is 664560877411. The next prime is 664560877447. The reversal of 664560877432 is 234778065466.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41535054832 + ... + 41535054847.

It is an arithmetic number, because the mean of its divisors is an integer number (155756455650).

Almost surely, 2^664560877432 is an apocalyptic number.

It is an amenable number.

664560877432 is a deficient number, since it is larger than the sum of its proper divisors (581490767768).

664560877432 is a wasteful number, since it uses less digits than its factorization.

664560877432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83070109685 (or 83070109681 counting only the distinct ones).

The product of its (nonzero) digits is 40642560, while the sum is 58.

The spelling of 664560877432 in words is "six hundred sixty-four billion, five hundred sixty million, eight hundred seventy-seven thousand, four hundred thirty-two".