125666226666635 has 4 divisors (see below), whose sum is σ = 150799471999968. Its totient is φ = 100532981333304.

The previous prime is 125666226666581. The next prime is 125666226666653. The reversal of 125666226666635 is 536666622666521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 125666226666635 - 2¹⁶ = 125666226601099 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12566622666659 + ... + 12566622666668.

It is an arithmetic number, because the mean of its divisors is an integer number (37699867999992).

Almost surely, 2^{125666226666635} is an apocalyptic number.

125666226666635 is a deficient number, since it is larger than the sum of its proper divisors (25133245333333).

125666226666635 is an equidigital number, since it uses as much as digits as its factorization.

125666226666635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25133245333332.

The product of its digits is 1007769600, while the sum is 68.

The spelling of 125666226666635 in words is "one hundred twenty-five trillion, six hundred sixty-six billion, two hundred twenty-six million, six hundred sixty-six thousand, six hundred thirty-five".