664961490915 has 32 divisors (see below), whose sum is σ = 1074371450880. Its totient is φ = 351169105536.

The previous prime is 664961490881. The next prime is 664961490929. The reversal of 664961490915 is 519094169466.

It is not a de Polignac number, because 664961490915 - 2²⁵ = 664927936483 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32000469 + ... + 32021241.

It is an arithmetic number, because the mean of its divisors is an integer number (33574107840).

Almost surely, 2^664961490915 is an apocalyptic number.

664961490915 is a deficient number, since it is larger than the sum of its proper divisors (409409959965).

664961490915 is a wasteful number, since it uses less digits than its factorization.

664961490915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41603.

The product of its (nonzero) digits is 12597120, while the sum is 60.

The spelling of 664961490915 in words is "six hundred sixty-four billion, nine hundred sixty-one million, four hundred ninety thousand, nine hundred fifteen".