666541882 has 32 divisors (see below), whose sum is σ = 1090279872. Its totient is φ = 304383744.

The previous prime is 666541873. The next prime is 666541949. The reversal of 666541882 is 288145666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 236908 + ... + 239704.

It is an arithmetic number, because the mean of its divisors is an integer number (34071246).

Almost surely, 2^666541882 is an apocalyptic number.

666541882 is a deficient number, since it is larger than the sum of its proper divisors (423737990).

666541882 is a wasteful number, since it uses less digits than its factorization.

666541882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3022.

The product of its digits is 552960, while the sum is 46.

The square root of 666541882 is about 25817.4724169505. The cubic root of 666541882 is about 873.5259566117.

The spelling of 666541882 in words is "six hundred sixty-six million, five hundred forty-one thousand, eight hundred eighty-two".