13660407 has 20 divisors (see below), whose sum is σ = 20571936. Its totient is φ = 9033120.

The previous prime is 13660403. The next prime is 13660441. The reversal of 13660407 is 70406631.

It is not a de Polignac number, because 13660407 - 2² = 13660403 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13660403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10482 + ... + 11712.

Almost surely, 2^13660407 is an apocalyptic number.

13660407 is a deficient number, since it is larger than the sum of its proper divisors (6911529).

13660407 is a wasteful number, since it uses less digits than its factorization.

13660407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1380 (or 1371 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 13660407 is about 3695.9987824673. The cubic root of 13660407 is about 239.0495220175.

The spelling of 13660407 in words is "thirteen million, six hundred sixty thousand, four hundred seven".