666727344 has 30 divisors (see below), whose sum is σ = 1865910956. Its totient is φ = 222242400.

The previous prime is 666727337. The next prime is 666727349. The reversal of 666727344 is 443727666.

It is a self number, because there is not a number n which added to its sum of digits gives 666727344.

It is not an unprimeable number, because it can be changed into a prime (666727349) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2314882 + ... + 2315169.

Almost surely, 2^666727344 is an apocalyptic number.

It is an amenable number.

666727344 is an abundant number, since it is smaller than the sum of its proper divisors (1199183612).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

666727344 is a wasteful number, since it uses less digits than its factorization.

666727344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4630065 (or 4630056 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 45.

The square root of 666727344 is about 25821.0639594886. The cubic root of 666727344 is about 873.6069671988.

The spelling of 666727344 in words is "six hundred sixty-six million, seven hundred twenty-seven thousand, three hundred forty-four".