666124643 has 8 divisors (see below), whose sum is σ = 696084000. Its totient is φ = 636248448.

The previous prime is 666124607. The next prime is 666124681. The reversal of 666124643 is 346421666.

It is a happy number.

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

It is not a de Polignac number, because 666124643 - 2⁸ = 666124387 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 666124597 and 666124606.

It is not an unprimeable number, because it can be changed into a prime (666123643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4118 + ... + 36731.

It is an arithmetic number, because the mean of its divisors is an integer number (87010500).

Almost surely, 2^666124643 is an apocalyptic number.

666124643 is a deficient number, since it is larger than the sum of its proper divisors (29959357).

666124643 is a wasteful number, since it uses less digits than its factorization.

666124643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41581.

The product of its digits is 124416, while the sum is 38.

The square root of 666124643 is about 25809.3905972226. The cubic root of 666124643 is about 873.3436499018.

The spelling of 666124643 in words is "six hundred sixty-six million, one hundred twenty-four thousand, six hundred forty-three".