13640166 has 24 divisors (see below), whose sum is σ = 29741400. Its totient is φ = 4517856.

The previous prime is 13640153. The next prime is 13640177. The reversal of 13640166 is 66104631.

13640166 is a `hidden beast` number, since 1 + 3 + 640 + 16 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 610 + ... + 5258.

It is an arithmetic number, because the mean of its divisors is an integer number (1239225).

Almost surely, 2^13640166 is an apocalyptic number.

13640166 is an abundant number, since it is smaller than the sum of its proper divisors (16101234).

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

13640166 is a wasteful number, since it uses less digits than its factorization.

13640166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4820 (or 4817 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 13640166 is about 3693.2595359655. The cubic root of 13640166 is about 238.9313949082.

Adding to 13640166 its reverse (66104631), we get a palindrome (79744797).

The spelling of 13640166 in words is "thirteen million, six hundred forty thousand, one hundred sixty-six".