12966631 has 4 divisors (see below), whose sum is σ = 13729392. Its totient is φ = 12203872.

The previous prime is 12966617. The next prime is 12966643. The reversal of 12966631 is 13666921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13666921 = 79 ⋅172999.

It is a cyclic number.

It is not a de Polignac number, because 12966631 - 2⁹ = 12966119 is a prime.

It is a super-2 number, since 2×12966631² = 336267038980322, which 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 (12966601) 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, 381355 + ... + 381388.

It is an arithmetic number, because the mean of its divisors is an integer number (3432348).

Almost surely, 2^12966631 is an apocalyptic number.

12966631 is a deficient number, since it is larger than the sum of its proper divisors (762761).

12966631 is an equidigital number, since it uses as much as digits as its factorization.

12966631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762760.

The product of its digits is 11664, while the sum is 34.

The square root of 12966631 is about 3600.9208544482. The cubic root of 12966631 is about 234.9321125769.

The spelling of 12966631 in words is "twelve million, nine hundred sixty-six thousand, six hundred thirty-one".