25466661 has 12 divisors (see below), whose sum is σ = 40129440. Its totient is φ = 15434280.

The previous prime is 25466653. The next prime is 25466689. The reversal of 25466661 is 16666452.

It is a happy number.

It is not a de Polignac number, because 25466661 - 2³ = 25466653 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25466461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128521 + ... + 128718.

It is an arithmetic number, because the mean of its divisors is an integer number (3344120).

Almost surely, 2^25466661 is an apocalyptic number.

It is an amenable number.

25466661 is a deficient number, since it is larger than the sum of its proper divisors (14662779).

25466661 is a wasteful number, since it uses less digits than its factorization.

25466661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257256 (or 257253 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 25466661 is about 5046.4503366228. The cubic root of 25466661 is about 294.2099361308.

The spelling of 25466661 in words is "twenty-five million, four hundred sixty-six thousand, six hundred sixty-one".