666666660158 has 16 divisors (see below), whose sum is σ = 1001557146240. Its totient is φ = 332814559896.

The previous prime is 666666660097. The next prime is 666666660161. The reversal of 666666660158 is 851066666666.

It is a self number, because there is not a number n which added to its sum of digits gives 666666660158.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4792535 + ... + 4929677.

It is an arithmetic number, because the mean of its divisors is an integer number (62597321640).

Almost surely, 2^666666660158 is an apocalyptic number.

666666660158 is a deficient number, since it is larger than the sum of its proper divisors (334890486082).

666666660158 is a wasteful number, since it uses less digits than its factorization.

666666660158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140911.

The product of its (nonzero) digits is 67184640, while the sum is 62.

The spelling of 666666660158 in words is "six hundred sixty-six billion, six hundred sixty-six million, six hundred sixty thousand, one hundred fifty-eight".