12617296666 has 16 divisors (see below), whose sum is σ = 20932647624. Its totient is φ = 5665978944.

The previous prime is 12617296661. The next prime is 12617296667. The reversal of 12617296666 is 66669271621.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7119815641 + 5497481025 = 84379^2 + 74145^2 .

It is not an unprimeable number, because it can be changed into a prime (12617296661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6556885 + ... + 6558808.

Almost surely, 2^12617296666 is an apocalyptic number.

12617296666 is a deficient number, since it is larger than the sum of its proper divisors (8315350958).

12617296666 is a wasteful number, since it uses less digits than its factorization.

12617296666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13115745.

The product of its digits is 1959552, while the sum is 52.

It can be divided in two parts, 1261 and 7296666, that added together give a palindrome (7297927).

The spelling of 12617296666 in words is "twelve billion, six hundred seventeen million, two hundred ninety-six thousand, six hundred sixty-six".