666581170 has 32 divisors (see below), whose sum is σ = 1253491200. Its totient is φ = 254738880.

The previous prime is 666581131. The next prime is 666581197. The reversal of 666581170 is 71185666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 355335 + ... + 357205.

It is an arithmetic number, because the mean of its divisors is an integer number (39171600).

Almost surely, 2^666581170 is an apocalyptic number.

666581170 is a deficient number, since it is larger than the sum of its proper divisors (586910030).

666581170 is a wasteful number, since it uses less digits than its factorization.

666581170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3450.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 666581170 is about 25818.2332858002. The cubic root of 666581170 is about 873.5431190309.

The spelling of 666581170 in words is "six hundred sixty-six million, five hundred eighty-one thousand, one hundred seventy".