13660403631 has 8 divisors (see below), whose sum is σ = 20815853184. Its totient is φ = 7805944920.

The previous prime is 13660403573. The next prime is 13660403633. The reversal of 13660403631 is 13630406631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13660403631 - 2¹⁰ = 13660402607 is a prime.

It is a super-2 number, since 2×13660403631² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13660403592 and 13660403601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13660403633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 325247685 + ... + 325247726.

It is an arithmetic number, because the mean of its divisors is an integer number (2601981648).

Almost surely, 2^13660403631 is an apocalyptic number.

13660403631 is a deficient number, since it is larger than the sum of its proper divisors (7155449553).

13660403631 is an equidigital number, since it uses as much as digits as its factorization.

13660403631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650495421.

The product of its (nonzero) digits is 23328, while the sum is 33.

The spelling of 13660403631 in words is "thirteen billion, six hundred sixty million, four hundred three thousand, six hundred thirty-one".