15660441 has 6 divisors (see below), whose sum is σ = 22620650. Its totient is φ = 10440288.

The previous prime is 15660433. The next prime is 15660443. The reversal of 15660441 is 14406651.

15660441 is a `hidden beast` number, since 1 + 56 + 604 + 4 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 14220441 + 1440000 = 3771^2 + 1200^2 .

It is not a de Polignac number, because 15660441 - 2³ = 15660433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15660443) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 870016 + ... + 870033.

Almost surely, 2^15660441 is an apocalyptic number.

It is an amenable number.

15660441 is a deficient number, since it is larger than the sum of its proper divisors (6960209).

15660441 is a wasteful number, since it uses less digits than its factorization.

15660441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1740055 (or 1740052 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 15660441 is about 3957.3275072958. The cubic root of 15660441 is about 250.1888759343.

The spelling of 15660441 in words is "fifteen million, six hundred sixty thousand, four hundred forty-one".