666164170 has 32 divisors (see below), whose sum is σ = 1402270848. Its totient is φ = 223086528.

The previous prime is 666164153. The next prime is 666164197. The reversal of 666164170 is 71461666.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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, 107649 + ... + 113668.

It is an arithmetic number, because the mean of its divisors is an integer number (43820964).

Almost surely, 2^666164170 is an apocalyptic number.

666164170 is an abundant number, since it is smaller than the sum of its proper divisors (736106678).

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

666164170 is a wasteful number, since it uses less digits than its factorization.

666164170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221374.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 666164170 is about 25810.1563342805. The cubic root of 666164170 is about 873.3609239320.

It can be divided in two parts, 666 and 164170, that added together give a square (164836 = 406²).

The spelling of 666164170 in words is "six hundred sixty-six million, one hundred sixty-four thousand, one hundred seventy".