13666290 has 32 divisors (see below), whose sum is σ = 35781696. Its totient is φ = 3312960.

The previous prime is 13666277. The next prime is 13666297. The reversal of 13666290 is 9266631.

It is a happy number.

13666290 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13666297) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20377 + ... + 21036.

It is an arithmetic number, because the mean of its divisors is an integer number (1118178).

Almost surely, 2^13666290 is an apocalyptic number.

13666290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13666290 is an abundant number, since it is smaller than the sum of its proper divisors (22115406).

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

13666290 is a wasteful number, since it uses less digits than its factorization.

13666290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41434.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 13666290 is about 3696.7945574511. The cubic root of 13666290 is about 239.0838335014.

The spelling of 13666290 in words is "thirteen million, six hundred sixty-six thousand, two hundred ninety".