664436734672370 has 64 divisors (see below), whose sum is σ = 1307294841968640. Its totient is φ = 241135352812800.

The previous prime is 664436734672363. The next prime is 664436734672397. The reversal of 664436734672370 is 73276437634466.

It is a self number, because there is not a number n which added to its sum of digits gives 664436734672370.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 192419660 + ... + 195842280.

It is an arithmetic number, because the mean of its divisors is an integer number (20426481905760).

Almost surely, 2^{664436734672370} is an apocalyptic number.

664436734672370 is a deficient number, since it is larger than the sum of its proper divisors (642858107296270).

664436734672370 is a wasteful number, since it uses less digits than its factorization.

664436734672370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3426131.

The product of its (nonzero) digits is 1536288768, while the sum is 68.

The spelling of 664436734672370 in words is "six hundred sixty-four trillion, four hundred thirty-six billion, seven hundred thirty-four million, six hundred seventy-two thousand, three hundred seventy".