13066631 has 4 divisors (see below), whose sum is σ = 13074600. Its totient is φ = 13058664.

The previous prime is 13066621. The next prime is 13066633. The reversal of 13066631 is 13666031.

13066631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 13066631 - 2¹⁰ = 13065607 is a prime.

It is a super-2 number, since 2×13066631² = 341473691380322, which contains 22 as substring.

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 13066631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13066633) 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, 521 + ... + 5138.

It is an arithmetic number, because the mean of its divisors is an integer number (3268650).

Almost surely, 2^13066631 is an apocalyptic number.

13066631 is a deficient number, since it is larger than the sum of its proper divisors (7969).

13066631 is an equidigital number, since it uses as much as digits as its factorization.

13066631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7968.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 13066631 is about 3614.7795230138. The cubic root of 13066631 is about 235.5345068989.

The spelling of 13066631 in words is "thirteen million, sixty-six thousand, six hundred thirty-one".