666568634 has 8 divisors (see below), whose sum is σ = 1032106368. Its totient is φ = 322533180.

The previous prime is 666568619. The next prime is 666568703. The reversal of 666568634 is 436865666.

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, 5375492 + ... + 5375615.

It is an arithmetic number, because the mean of its divisors is an integer number (129013296).

Almost surely, 2^666568634 is an apocalyptic number.

666568634 is a deficient number, since it is larger than the sum of its proper divisors (365537734).

666568634 is a wasteful number, since it uses less digits than its factorization.

666568634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10751140.

The product of its digits is 3732480, while the sum is 50.

The square root of 666568634 is about 25817.9905104948. The cubic root of 666568634 is about 873.5376429260.

The spelling of 666568634 in words is "six hundred sixty-six million, five hundred sixty-eight thousand, six hundred thirty-four".