12699660023 has 4 divisors (see below), whose sum is σ = 12739722360. Its totient is φ = 12659597688.

The previous prime is 12699660011. The next prime is 12699660047. The reversal of 12699660023 is 32006699621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12699660023 - 2⁴ = 12699660007 is a prime.

It is a super-2 number, since 2×12699660023² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12699660073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20030693 + ... + 20031326.

It is an arithmetic number, because the mean of its divisors is an integer number (3184930590).

Almost surely, 2^12699660023 is an apocalyptic number.

12699660023 is a deficient number, since it is larger than the sum of its proper divisors (40062337).

12699660023 is an equidigital number, since it uses as much as digits as its factorization.

12699660023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40062336.

The product of its (nonzero) digits is 209952, while the sum is 44.

The spelling of 12699660023 in words is "twelve billion, six hundred ninety-nine million, six hundred sixty thousand, twenty-three".