13641666 has 16 divisors (see below), whose sum is σ = 27554688. Its totient is φ = 4502000.

The previous prime is 13641637. The next prime is 13641671. The reversal of 13641666 is 66614631.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10650 + ... + 11861.

It is an arithmetic number, because the mean of its divisors is an integer number (1722168).

Almost surely, 2^13641666 is an apocalyptic number.

13641666 is an abundant number, since it is smaller than the sum of its proper divisors (13913022).

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

13641666 is a wasteful number, since it uses less digits than its factorization.

13641666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22617.

The product of its digits is 15552, while the sum is 33.

The square root of 13641666 is about 3693.4626030326. The cubic root of 13641666 is about 238.9401529628.

The spelling of 13641666 in words is "thirteen million, six hundred forty-one thousand, six hundred sixty-six".