666051628 has 12 divisors (see below), whose sum is σ = 1271553192. Its totient is φ = 302750720.

The previous prime is 666051599. The next prime is 666051643. The reversal of 666051628 is 826150666.

It is a super-2 number, since 2×666051628² = 887249542322900768, which contains 22 as substring.

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, 7568725 + ... + 7568812.

It is an arithmetic number, because the mean of its divisors is an integer number (105962766).

Almost surely, 2^666051628 is an apocalyptic number.

It is an amenable number.

666051628 is a deficient number, since it is larger than the sum of its proper divisors (605501564).

666051628 is a wasteful number, since it uses less digits than its factorization.

666051628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15137552 (or 15137550 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 666051628 is about 25807.9760539257. The cubic root of 666051628 is about 873.3117391989.

The spelling of 666051628 in words is "six hundred sixty-six million, fifty-one thousand, six hundred twenty-eight".