25666960 has 40 divisors (see below), whose sum is σ = 65102976. Its totient is φ = 9333120.

The previous prime is 25666903. The next prime is 25666969. The reversal of 25666960 is 6966652.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (25666969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13704 + ... + 15463.

Almost surely, 2^25666960 is an apocalyptic number.

25666960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25666960 is an abundant number, since it is smaller than the sum of its proper divisors (39436016).

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

25666960 is a wasteful number, since it uses less digits than its factorization.

25666960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29191 (or 29185 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 25666960 is about 5066.2570009821. The cubic root of 25666960 is about 294.9792573752.

The spelling of 25666960 in words is "twenty-five million, six hundred sixty-six thousand, nine hundred sixty".