668091170 has 16 divisors (see below), whose sum is σ = 1220514048. Its totient is φ = 263247600.

The previous prime is 668091121. The next prime is 668091173. The reversal of 668091170 is 71190866.

It is a super-2 number, since 2×668091170² = 892691622863937800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (668091173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 497906 + ... + 499245.

It is an arithmetic number, because the mean of its divisors is an integer number (76282128).

Almost surely, 2^668091170 is an apocalyptic number.

668091170 is a deficient number, since it is larger than the sum of its proper divisors (552422878).

668091170 is a wasteful number, since it uses less digits than its factorization.

668091170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997225.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 668091170 is about 25847.4596430674. The cubic root of 668091170 is about 874.2022312341.

The spelling of 668091170 in words is "six hundred sixty-eight million, ninety-one thousand, one hundred seventy".