126665879427 has 24 divisors (see below), whose sum is σ = 200964940800. Its totient is φ = 76521261168.

The previous prime is 126665879407. The next prime is 126665879429. The reversal of 126665879427 is 724978566621.

It is not a de Polignac number, because 126665879427 - 2⁶ = 126665879363 is a prime.

It is a super-2 number, since 2×126665879427² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (126665879429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16099027 + ... + 16106892.

It is an arithmetic number, because the mean of its divisors is an integer number (8373539200).

Almost surely, 2^126665879427 is an apocalyptic number.

126665879427 is a deficient number, since it is larger than the sum of its proper divisors (74299061373).

126665879427 is a wasteful number, since it uses less digits than its factorization.

126665879427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32205967 (or 32205964 counting only the distinct ones).

The product of its digits is 60963840, while the sum is 63.

The spelling of 126665879427 in words is "one hundred twenty-six billion, six hundred sixty-five million, eight hundred seventy-nine thousand, four hundred twenty-seven".