660066674 has 8 divisors (see below), whose sum is σ = 998862300. Its totient is φ = 327112576.

The previous prime is 660066559. The next prime is 660066691. The reversal of 660066674 is 476660066.

It can be written as a sum of positive squares in 2 ways, for example, as 524181025 + 135885649 = 22895^2 + 11657^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 1460099 + ... + 1460550.

Almost surely, 2^660066674 is an apocalyptic number.

660066674 is a deficient number, since it is larger than the sum of its proper divisors (338795626).

660066674 is a wasteful number, since it uses less digits than its factorization.

660066674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2920764.

The product of its (nonzero) digits is 217728, while the sum is 41.

The square root of 660066674 is about 25691.7627655247. The cubic root of 660066674 is about 870.6880864649.

The spelling of 660066674 in words is "six hundred sixty million, sixty-six thousand, six hundred seventy-four".