666068194 has 64 divisors (see below), whose sum is σ = 1197504000. Its totient is φ = 274417920.

The previous prime is 666068173. The next prime is 666068203. The reversal of 666068194 is 491860666.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1334557 + ... + 1335055.

It is an arithmetic number, because the mean of its divisors is an integer number (18711000).

Almost surely, 2^666068194 is an apocalyptic number.

666068194 is a deficient number, since it is larger than the sum of its proper divisors (531435806).

666068194 is a wasteful number, since it uses less digits than its factorization.

666068194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655.

The product of its (nonzero) digits is 373248, while the sum is 46.

The square root of 666068194 is about 25808.2969992210. The cubic root of 666068194 is about 873.3189794596.

The spelling of 666068194 in words is "six hundred sixty-six million, sixty-eight thousand, one hundred ninety-four".