25566480 has 60 divisors (see below), whose sum is σ = 85863180. Its totient is φ = 6817536.

The previous prime is 25566479. The next prime is 25566481. The reversal of 25566480 is 8466552.

25566480 is a `hidden beast` number, since 2 + 5 + 5 + 6 + 648 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (25566479) and next prime (25566481).

It can be written as a sum of positive squares in 2 ways, for example, as 5531904 + 20034576 = 2352^2 + 4476^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (25566481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17035 + ... + 18474.

It is an arithmetic number, because the mean of its divisors is an integer number (1431053).

Almost surely, 2^25566480 is an apocalyptic number.

25566480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25566480 is an abundant number, since it is smaller than the sum of its proper divisors (60296700).

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

25566480 is a wasteful number, since it uses less digits than its factorization.

25566480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35528 (or 35519 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 25566480 is about 5056.3306853884. The cubic root of 25566480 is about 294.5938296071.

The spelling of 25566480 in words is "twenty-five million, five hundred sixty-six thousand, four hundred eighty".