25660623 has 4 divisors (see below), whose sum is σ = 34214168. Its totient is φ = 17107080.

The previous prime is 25660619. The next prime is 25660669. The reversal of 25660623 is 32606652.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 25660623 - 2² = 25660619 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25660603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4276768 + ... + 4276773.

It is an arithmetic number, because the mean of its divisors is an integer number (8553542).

Almost surely, 2^25660623 is an apocalyptic number.

25660623 is a deficient number, since it is larger than the sum of its proper divisors (8553545).

25660623 is an equidigital number, since it uses as much as digits as its factorization.

25660623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8553544.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 25660623 is about 5065.6315499649. The cubic root of 25660623 is about 294.9549792447.

The spelling of 25660623 in words is "twenty-five million, six hundred sixty thousand, six hundred twenty-three".