666732674 has 8 divisors (see below), whose sum is σ = 1027128828. Its totient is φ = 324356400.

The previous prime is 666732653. The next prime is 666732683. The reversal of 666732674 is 476237666.

It can be written as a sum of positive squares in 2 ways, for example, as 568584025 + 98148649 = 23845^2 + 9907^2 .

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

It is a Curzon number.

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, 4504877 + ... + 4505024.

Almost surely, 2^666732674 is an apocalyptic number.

666732674 is a deficient number, since it is larger than the sum of its proper divisors (360396154).

666732674 is a wasteful number, since it uses less digits than its factorization.

666732674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9009940.

The product of its digits is 1524096, while the sum is 47.

The square root of 666732674 is about 25821.1671695917. The cubic root of 666732674 is about 873.6092951433.

The spelling of 666732674 in words is "six hundred sixty-six million, seven hundred thirty-two thousand, six hundred seventy-four".