664610688346 has 32 divisors (see below), whose sum is σ = 1109279912256. Its totient is φ = 296093232000.

The previous prime is 664610688331. The next prime is 664610688419. The reversal of 664610688346 is 643886016466.

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, 495195 + ... + 1254766.

It is an arithmetic number, because the mean of its divisors is an integer number (34664997258).

Almost surely, 2^664610688346 is an apocalyptic number.

664610688346 is a deficient number, since it is larger than the sum of its proper divisors (444669223910).

664610688346 is a wasteful number, since it uses less digits than its factorization.

664610688346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1750318.

The product of its (nonzero) digits is 23887872, while the sum is 58.

The spelling of 664610688346 in words is "six hundred sixty-four billion, six hundred ten million, six hundred eighty-eight thousand, three hundred forty-six".