12997566693 has 16 divisors (see below), whose sum is σ = 19378308160. Its totient is φ = 8609850288.

The previous prime is 12997566689. The next prime is 12997566697. The reversal of 12997566693 is 39666579921.

It is an interprime number because it is at equal distance from previous prime (12997566689) and next prime (12997566697).

It is not a de Polignac number, because 12997566693 - 2² = 12997566689 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12997566693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12997566697) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1528855 + ... + 1537332.

It is an arithmetic number, because the mean of its divisors is an integer number (1211144260).

Almost surely, 2^12997566693 is an apocalyptic number.

It is an amenable number.

12997566693 is a deficient number, since it is larger than the sum of its proper divisors (6380741467).

12997566693 is a wasteful number, since it uses less digits than its factorization.

12997566693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3066353 (or 3066347 counting only the distinct ones).

The product of its digits is 33067440, while the sum is 63.

It can be divided in two parts, 1299756 and 6693, that added together give a square (1306449 = 1143²).

The spelling of 12997566693 in words is "twelve billion, nine hundred ninety-seven million, five hundred sixty-six thousand, six hundred ninety-three".