664786833470 has 32 divisors (see below), whose sum is σ = 1211542139808. Its totient is φ = 262609625088.

The previous prime is 664786833457. The next prime is 664786833497. The reversal of 664786833470 is 74338687466.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 280787 + ... + 1186766.

It is an arithmetic number, because the mean of its divisors is an integer number (37860691869).

Almost surely, 2^664786833470 is an apocalyptic number.

664786833470 is a deficient number, since it is larger than the sum of its proper divisors (546755306338).

664786833470 is a wasteful number, since it uses less digits than its factorization.

664786833470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1468124.

The product of its (nonzero) digits is 97542144, while the sum is 62.

The spelling of 664786833470 in words is "six hundred sixty-four billion, seven hundred eighty-six million, eight hundred thirty-three thousand, four hundred seventy".