12397666371 has 4 divisors (see below), whose sum is σ = 16530221832. Its totient is φ = 8265110912.

The previous prime is 12397666339. The next prime is 12397666397. The reversal of 12397666371 is 17366679321.

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 12397666371 - 2⁵ = 12397666339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12397666301) 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, 2066277726 + ... + 2066277731.

It is an arithmetic number, because the mean of its divisors is an integer number (4132555458).

Almost surely, 2^12397666371 is an apocalyptic number.

12397666371 is a deficient number, since it is larger than the sum of its proper divisors (4132555461).

12397666371 is an equidigital number, since it uses as much as digits as its factorization.

12397666371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4132555460.

The product of its digits is 1714608, while the sum is 51.

The spelling of 12397666371 in words is "twelve billion, three hundred ninety-seven million, six hundred sixty-six thousand, three hundred seventy-one".