25542666 has 12 divisors (see below), whose sum is σ = 55342482. Its totient is φ = 8514216.

The previous prime is 25542641. The next prime is 25542677. The reversal of 25542666 is 66624552.

It can be written as a sum of positive squares in only one way, i.e., 20385225 + 5157441 = 4515^2 + 2271^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25542666.

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, 709501 + ... + 709536.

Almost surely, 2^25542666 is an apocalyptic number.

25542666 is an abundant number, since it is smaller than the sum of its proper divisors (29799816).

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

25542666 is a wasteful number, since it uses less digits than its factorization.

25542666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1419045 (or 1419042 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 25542666 is about 5053.9752670546. The cubic root of 25542666 is about 294.5023343266.

The spelling of 25542666 in words is "twenty-five million, five hundred forty-two thousand, six hundred sixty-six".