25665057 has 24 divisors (see below), whose sum is σ = 41434848. Its totient is φ = 15172800.

The previous prime is 25665047. The next prime is 25665071. The reversal of 25665057 is 75056652.

It is not a de Polignac number, because 25665057 - 2⁴ = 25665041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25665047) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 898 + ... + 7220.

It is an arithmetic number, because the mean of its divisors is an integer number (1726452).

Almost surely, 2^25665057 is an apocalyptic number.

It is an amenable number.

25665057 is a deficient number, since it is larger than the sum of its proper divisors (15769791).

25665057 is a wasteful number, since it uses less digits than its factorization.

25665057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6381 (or 6378 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 36.

The square root of 25665057 is about 5066.0691862627. The cubic root of 25665057 is about 294.9719670767.

The spelling of 25665057 in words is "twenty-five million, six hundred sixty-five thousand, fifty-seven".