666558547137 has 12 divisors (see below), whose sum is σ = 1100350617600. Its totient is φ = 380890598328.

The previous prime is 666558547021. The next prime is 666558547139. The reversal of 666558547137 is 731745855666.

It is not a de Polignac number, because 666558547137 - 2⁷ = 666558547009 is a prime.

It is a super-2 number, since 2×666558547137² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63), and also a Moran number because the ratio is a prime number: 10580294399 = 666558547137 / (6 + 6 + 6 + 5 + 5 + 8 + 5 + 4 + 7 + 1 + 3 + 7).

It is not an unprimeable number, because it can be changed into a prime (666558547139) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 5290147137 + ... + 5290147262.

It is an arithmetic number, because the mean of its divisors is an integer number (91695884800).

Almost surely, 2^666558547137 is an apocalyptic number.

It is an amenable number.

666558547137 is a deficient number, since it is larger than the sum of its proper divisors (433792070463).

666558547137 is a wasteful number, since it uses less digits than its factorization.

666558547137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10580294412 (or 10580294409 counting only the distinct ones).

The product of its digits is 127008000, while the sum is 63.

The spelling of 666558547137 in words is "six hundred sixty-six billion, five hundred fifty-eight million, five hundred forty-seven thousand, one hundred thirty-seven".