13166685 has 32 divisors (see below), whose sum is σ = 26753280. Its totient is φ = 6018624.

The previous prime is 13166669. The next prime is 13166701. The reversal of 13166685 is 58666131.

It is a happy number.

13166685 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13166669) and next prime (13166701).

It is not a de Polignac number, because 13166685 - 2⁴ = 13166669 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6022 + ... + 7911.

It is an arithmetic number, because the mean of its divisors is an integer number (836040).

Almost surely, 2^13166685 is an apocalyptic number.

13166685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13166685 is an abundant number, since it is smaller than the sum of its proper divisors (13586595).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13166685 is a wasteful number, since it uses less digits than its factorization.

13166685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13954 (or 13948 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 13166685 is about 3628.5927024123. The cubic root of 13166685 is about 236.1341583756.

It can be divided in two parts, 1316 and 6685, that added together give a triangular number (8001 = T₁₂₆).

The spelling of 13166685 in words is "thirteen million, one hundred sixty-six thousand, six hundred eighty-five".