25678767 has 4 divisors (see below), whose sum is σ = 34238360. Its totient is φ = 17119176.

The previous prime is 25678739. The next prime is 25678769. The reversal of 25678767 is 76787652.

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

It is not a de Polignac number, because 25678767 - 2²⁰ = 24630191 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25678769) 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, 4279792 + ... + 4279797.

It is an arithmetic number, because the mean of its divisors is an integer number (8559590).

Almost surely, 2^25678767 is an apocalyptic number.

25678767 is a deficient number, since it is larger than the sum of its proper divisors (8559593).

25678767 is an equidigital number, since it uses as much as digits as its factorization.

25678767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8559592.

The product of its digits is 987840, while the sum is 48.

The square root of 25678767 is about 5067.4221256967. The cubic root of 25678767 is about 295.0244813543.

The spelling of 25678767 in words is "twenty-five million, six hundred seventy-eight thousand, seven hundred sixty-seven".