25530866 has 4 divisors (see below), whose sum is σ = 38296302. Its totient is φ = 12765432.

The previous prime is 25530859. The next prime is 25530871. The reversal of 25530866 is 66803552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18619225 + 6911641 = 4315^2 + 2629^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6382715 + ... + 6382718.

Almost surely, 2^25530866 is an apocalyptic number.

25530866 is a deficient number, since it is larger than the sum of its proper divisors (12765436).

25530866 is a wasteful number, since it uses less digits than its factorization.

25530866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12765435.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 25530866 is about 5052.8077343196. The cubic root of 25530866 is about 294.4569767170.

The spelling of 25530866 in words is "twenty-five million, five hundred thirty thousand, eight hundred sixty-six".