12400665567 has 16 divisors (see below), whose sum is σ = 16804346592. Its totient is φ = 8133091200.

The previous prime is 12400665523. The next prime is 12400665581. The reversal of 12400665567 is 76556600421.

It is not a de Polignac number, because 12400665567 - 2⁶ = 12400665503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12400645567) 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 15 ways as a sum of consecutive naturals, for example, 82768 + ... + 177909.

It is an arithmetic number, because the mean of its divisors is an integer number (1050271662).

Almost surely, 2^12400665567 is an apocalyptic number.

12400665567 is a deficient number, since it is larger than the sum of its proper divisors (4403681025).

12400665567 is a wasteful number, since it uses less digits than its factorization.

12400665567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260938.

The product of its (nonzero) digits is 302400, while the sum is 42.

The spelling of 12400665567 in words is "twelve billion, four hundred million, six hundred sixty-five thousand, five hundred sixty-seven".