12697469666 has 16 divisors (see below), whose sum is σ = 22211318400. Its totient is φ = 5441772420.

The previous prime is 12697469651. The next prime is 12697469749. The reversal of 12697469666 is 66696479621.

It is a super-2 number, since 2×12697469666² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12697469599 and 12697469608.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9254030 + ... + 9255401.

It is an arithmetic number, because the mean of its divisors is an integer number (1388207400).

Almost surely, 2^12697469666 is an apocalyptic number.

12697469666 is a deficient number, since it is larger than the sum of its proper divisors (9513848734).

12697469666 is an equidigital number, since it uses as much as digits as its factorization.

12697469666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18509454 (or 18509440 counting only the distinct ones).

The product of its digits is 35271936, while the sum is 62.

The spelling of 12697469666 in words is "twelve billion, six hundred ninety-seven million, four hundred sixty-nine thousand, six hundred sixty-six".