25560666 has 12 divisors (see below), whose sum is σ = 55381482. Its totient is φ = 8520216.

The previous prime is 25560641. The next prime is 25560683. The reversal of 25560666 is 66606552.

It can be written as a sum of positive squares in only one way, i.e., 24295041 + 1265625 = 4929^2 + 1125^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25560666.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 710001 + ... + 710036.

Almost surely, 2^25560666 is an apocalyptic number.

25560666 is an abundant number, since it is smaller than the sum of its proper divisors (29820816).

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

25560666 is a wasteful number, since it uses less digits than its factorization.

25560666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1420045 (or 1420042 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 25560666 is about 5055.7557298588. The cubic root of 25560666 is about 294.5714970011.

The spelling of 25560666 in words is "twenty-five million, five hundred sixty thousand, six hundred sixty-six".