664885000836 has 72 divisors (see below), whose sum is σ = 1920866822784. Its totient is φ = 189958446720.

The previous prime is 664885000823. The next prime is 664885000853. The reversal of 664885000836 is 638000588466.

664885000836 is a `hidden beast` number, since 66 + 48 + 8 + 500 + 0 + 8 + 36 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7168936 + ... + 7261088.

It is an arithmetic number, because the mean of its divisors is an integer number (26678705872).

Almost surely, 2^664885000836 is an apocalyptic number.

It is an amenable number.

664885000836 is an abundant number, since it is smaller than the sum of its proper divisors (1255981821948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664885000836 is a wasteful number, since it uses less digits than its factorization.

664885000836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120801 (or 120796 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 54.

The spelling of 664885000836 in words is "six hundred sixty-four billion, eight hundred eighty-five million, eight hundred thirty-six", and thus it is an aban number.