25678664 has 32 divisors (see below), whose sum is σ = 54224640. Its totient is φ = 11294400.

The previous prime is 25678663. The next prime is 25678691. The reversal of 25678664 is 46687652.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (25678661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1979 + ... + 7434.

It is an arithmetic number, because the mean of its divisors is an integer number (1694520).

Almost surely, 2^25678664 is an apocalyptic number.

It is an amenable number.

25678664 is an abundant number, since it is smaller than the sum of its proper divisors (28545976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25678664 is a wasteful number, since it uses less digits than its factorization.

25678664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9461 (or 9457 counting only the distinct ones).

The product of its digits is 483840, while the sum is 44.

The square root of 25678664 is about 5067.4119627281. The cubic root of 25678664 is about 295.0240868966.

The spelling of 25678664 in words is "twenty-five million, six hundred seventy-eight thousand, six hundred sixty-four".