126765666999 has 12 divisors (see below), whose sum is σ = 183766999416. Its totient is φ = 84205351152.

The previous prime is 126765666983. The next prime is 126765667001. The reversal of 126765666999 is 999666567621.

It is not a de Polignac number, because 126765666999 - 2⁴ = 126765666983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126765666919) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25421829 + ... + 25426814.

It is an arithmetic number, because the mean of its divisors is an integer number (15313916618).

Almost surely, 2^126765666999 is an apocalyptic number.

126765666999 is a deficient number, since it is larger than the sum of its proper divisors (57001332417).

126765666999 is a wasteful number, since it uses less digits than its factorization.

126765666999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50848926 (or 50848923 counting only the distinct ones).

The product of its digits is 396809280, while the sum is 72.

The spelling of 126765666999 in words is "one hundred twenty-six billion, seven hundred sixty-five million, six hundred sixty-six thousand, nine hundred ninety-nine".