25669680 has 40 divisors (see below), whose sum is σ = 79576752. Its totient is φ = 6845184.

The previous prime is 25669673. The next prime is 25669681. The reversal of 25669680 is 8696652.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (25669681) 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, 53239 + ... + 53718.

Almost surely, 2^25669680 is an apocalyptic number.

25669680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25669680 is an abundant number, since it is smaller than the sum of its proper divisors (53907072).

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

25669680 is a wasteful number, since it uses less digits than its factorization.

25669680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106973 (or 106967 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 25669680 is about 5066.5254366281. The cubic root of 25669680 is about 294.9896769346.

It can be divided in two parts, 2566 and 9680, that added together give a triangular number (12246 = T₁₅₆).

The spelling of 25669680 in words is "twenty-five million, six hundred sixty-nine thousand, six hundred eighty".