12657450663 has 80 divisors (see below), whose sum is σ = 22527977472. Its totient is φ = 6980904000.

The previous prime is 12657450661. The next prime is 12657450679. The reversal of 12657450663 is 36605475621.

12657450663 is a `hidden beast` number, since 1 + 26 + 574 + 50 + 6 + 6 + 3 = 666.

It is not a de Polignac number, because 12657450663 - 2¹ = 12657450661 is a prime.

It is a super-2 number, since 2×12657450663² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12657450661) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 814698 + ... + 830088.

Almost surely, 2^12657450663 is an apocalyptic number.

12657450663 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12657450663 is a deficient number, since it is larger than the sum of its proper divisors (9870526809).

12657450663 is a wasteful number, since it uses less digits than its factorization.

12657450663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15498 (or 15489 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 45.

The spelling of 12657450663 in words is "twelve billion, six hundred fifty-seven million, four hundred fifty thousand, six hundred sixty-three".