666665882 has 8 divisors (see below), whose sum is σ = 1052630400. Its totient is φ = 315789084.

The previous prime is 666665873. The next prime is 666665887. The reversal of 666665882 is 288566666.

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

It is not an unprimeable number, because it can be changed into a prime (666665887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8771882 + ... + 8771957.

It is an arithmetic number, because the mean of its divisors is an integer number (131578800).

Almost surely, 2^666665882 is an apocalyptic number.

666665882 is a deficient number, since it is larger than the sum of its proper divisors (385964518).

666665882 is a wasteful number, since it uses less digits than its factorization.

666665882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17543860.

The product of its digits is 4976640, while the sum is 53.

The square root of 666665882 is about 25819.8737797070. The cubic root of 666665882 is about 873.5801220014.

The spelling of 666665882 in words is "six hundred sixty-six million, six hundred sixty-five thousand, eight hundred eighty-two".