666674066 has 16 divisors (see below), whose sum is σ = 1027847256. Its totient is φ = 324072576.

The previous prime is 666674059. The next prime is 666674083. The reversal of 666674066 is 660476666.

It can be written as a sum of positive squares in 4 ways, for example, as 633277225 + 33396841 = 25165^2 + 5779^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 666674066.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119900 + ... + 125336.

Almost surely, 2^666674066 is an apocalyptic number.

666674066 is a deficient number, since it is larger than the sum of its proper divisors (361173190).

666674066 is a wasteful number, since it uses less digits than its factorization.

666674066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7133.

The product of its (nonzero) digits is 1306368, while the sum is 47.

The square root of 666674066 is about 25820.0322617924. The cubic root of 666674066 is about 873.5836966809.

The spelling of 666674066 in words is "six hundred sixty-six million, six hundred seventy-four thousand, sixty-six".