12657736266 has 32 divisors (see below), whose sum is σ = 28966533120. Its totient is φ = 3612175536.

The previous prime is 12657736249. The next prime is 12657736283. The reversal of 12657736266 is 66263775621.

It is an interprime number because it is at equal distance from previous prime (12657736249) and next prime (12657736283).

It is a super-2 number, since 2×12657736266² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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, 144366 + ... + 214841.

It is an arithmetic number, because the mean of its divisors is an integer number (905204160).

Almost surely, 2^12657736266 is an apocalyptic number.

12657736266 is an abundant number, since it is smaller than the sum of its proper divisors (16308796854).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12657736266 is a wasteful number, since it uses less digits than its factorization.

12657736266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360058.

The product of its digits is 3810240, while the sum is 51.

The spelling of 12657736266 in words is "twelve billion, six hundred fifty-seven million, seven hundred thirty-six thousand, two hundred sixty-six".