25266681 has 32 divisors (see below), whose sum is σ = 41120640. Its totient is φ = 15206400.

The previous prime is 25266613. The next prime is 25266707. The reversal of 25266681 is 18666252.

It is not a de Polignac number, because 25266681 - 2¹⁰ = 25265657 is a prime.

It is a super-2 number, since 2×25266681² = 1276810337511522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25266601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71401 + ... + 71753.

It is an arithmetic number, because the mean of its divisors is an integer number (1285020).

Almost surely, 2^25266681 is an apocalyptic number.

It is an amenable number.

25266681 is a deficient number, since it is larger than the sum of its proper divisors (15853959).

25266681 is a wasteful number, since it uses less digits than its factorization.

25266681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614 (or 608 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 25266681 is about 5026.5973580545. The cubic root of 25266681 is about 293.4378052748.

The spelling of 25266681 in words is "twenty-five million, two hundred sixty-six thousand, six hundred eighty-one".