25164665 has 8 divisors (see below), whose sum is σ = 30767688. Its totient is φ = 19751680.

The previous prime is 25164649. The next prime is 25164673. The reversal of 25164665 is 56646152.

It can be written as a sum of positive squares in 4 ways, for example, as 10086976 + 15077689 = 3176^2 + 3883^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25164665 - 2⁴ = 25164649 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47216 + ... + 47745.

It is an arithmetic number, because the mean of its divisors is an integer number (3845961).

Almost surely, 2^25164665 is an apocalyptic number.

It is an amenable number.

25164665 is a deficient number, since it is larger than the sum of its proper divisors (5603023).

25164665 is an equidigital number, since it uses as much as digits as its factorization.

25164665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95019.

The product of its digits is 43200, while the sum is 35.

The square root of 25164665 is about 5016.4394743682. The cubic root of 25164665 is about 293.0423473138.

The spelling of 25164665 in words is "twenty-five million, one hundred sixty-four thousand, six hundred sixty-five".