25405667 has 16 divisors (see below), whose sum is σ = 31377600. Its totient is φ = 20490624.

The previous prime is 25405661. The next prime is 25405693. The reversal of 25405667 is 76650452.

It is not a de Polignac number, because 25405667 - 2⁸ = 25405411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25405661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3653 + ... + 8009.

It is an arithmetic number, because the mean of its divisors is an integer number (1961100).

Almost surely, 2^25405667 is an apocalyptic number.

25405667 is a deficient number, since it is larger than the sum of its proper divisors (5971933).

25405667 is an equidigital number, since it uses as much as digits as its factorization.

25405667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4395 (or 4381 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 25405667 is about 5040.4034560737. The cubic root of 25405667 is about 293.9748655762.

The spelling of 25405667 in words is "twenty-five million, four hundred five thousand, six hundred sixty-seven".