25564466 has 4 divisors (see below), whose sum is σ = 38346702. Its totient is φ = 12782232.

The previous prime is 25564459. The next prime is 25564471. The reversal of 25564466 is 66446552.

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., 25210441 + 354025 = 5021^2 + 595^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6391115 + ... + 6391118.

Almost surely, 2^25564466 is an apocalyptic number.

25564466 is a deficient number, since it is larger than the sum of its proper divisors (12782236).

25564466 is a wasteful number, since it uses less digits than its factorization.

25564466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12782235.

The product of its digits is 172800, while the sum is 38.

The square root of 25564466 is about 5056.1315251880. The cubic root of 25564466 is about 294.5860938589.

The spelling of 25564466 in words is "twenty-five million, five hundred sixty-four thousand, four hundred sixty-six".