664610526164 has 48 divisors (see below), whose sum is σ = 1300793554368. Its totient is φ = 295137900288.

The previous prime is 664610526157. The next prime is 664610526199. The reversal of 664610526164 is 461625016466.

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, 2068337 + ... + 2367960.

It is an arithmetic number, because the mean of its divisors is an integer number (27099865716).

Almost surely, 2^664610526164 is an apocalyptic number.

It is an amenable number.

664610526164 is a deficient number, since it is larger than the sum of its proper divisors (636183028204).

664610526164 is a wasteful number, since it uses less digits than its factorization.

664610526164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4436424 (or 4436422 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 47.

The spelling of 664610526164 in words is "six hundred sixty-four billion, six hundred ten million, five hundred twenty-six thousand, one hundred sixty-four".