666141992 has 16 divisors (see below), whose sum is σ = 1249840800. Its totient is φ = 332851120.

The previous prime is 666141989. The next prime is 666142007. The reversal of 666141992 is 299141666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14234 + ... + 39177.

It is an arithmetic number, because the mean of its divisors is an integer number (78115050).

Almost surely, 2^666141992 is an apocalyptic number.

It is an amenable number.

666141992 is a deficient number, since it is larger than the sum of its proper divisors (583698808).

666141992 is a wasteful number, since it uses less digits than its factorization.

666141992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54976 (or 54972 counting only the distinct ones).

The product of its digits is 139968, while the sum is 44.

The square root of 666141992 is about 25809.7266936324. The cubic root of 666141992 is about 873.3512318199.

The spelling of 666141992 in words is "six hundred sixty-six million, one hundred forty-one thousand, nine hundred ninety-two".