666666674 has 8 divisors (see below), whose sum is σ = 1034482860. Its totient is φ = 321839056.

The previous prime is 666666667. The next prime is 666666691. The reversal of 666666674 is 476666666.

It can be written as a sum of positive squares in 2 ways, for example, as 620358649 + 46308025 = 24907^2 + 6805^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5747069 + ... + 5747184.

Almost surely, 2^666666674 is an apocalyptic number.

666666674 is a deficient number, since it is larger than the sum of its proper divisors (367816186).

666666674 is a wasteful number, since it uses less digits than its factorization.

666666674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11494284.

The product of its digits is 7838208, while the sum is 53.

The square root of 666666674 is about 25819.8891167255. The cubic root of 666666674 is about 873.5804679394.

The spelling of 666666674 in words is "six hundred sixty-six million, six hundred sixty-six thousand, six hundred seventy-four".