664865106 has 32 divisors (see below), whose sum is σ = 1358588160. Its totient is φ = 216862464.

The previous prime is 664865059. The next prime is 664865177. The reversal of 664865106 is 601568466.

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, 47356 + ... + 59768.

It is an arithmetic number, because the mean of its divisors is an integer number (42455880).

Almost surely, 2^664865106 is an apocalyptic number.

664865106 is an abundant number, since it is smaller than the sum of its proper divisors (693723054).

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

664865106 is a wasteful number, since it uses less digits than its factorization.

664865106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12610.

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 664865106 is about 25784.9783013289. The cubic root of 664865106 is about 872.7928507403.

The spelling of 664865106 in words is "six hundred sixty-four million, eight hundred sixty-five thousand, one hundred six".