666479886 has 8 divisors (see below), whose sum is σ = 1332959784. Its totient is φ = 222159960.

The previous prime is 666479873. The next prime is 666479893. The reversal of 666479886 is 688974666.

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

666479886 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55539985 + ... + 55539996.

It is an arithmetic number, because the mean of its divisors is an integer number (166619973).

Almost surely, 2^666479886 is an apocalyptic number.

666479886 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

666479886 is a wasteful number, since it uses less digits than its factorization.

666479886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111079986.

The product of its digits is 20901888, while the sum is 60.

The square root of 666479886 is about 25816.2717292796. The cubic root of 666479886 is about 873.4988731452.

The spelling of 666479886 in words is "six hundred sixty-six million, four hundred seventy-nine thousand, eight hundred eighty-six".