25166720 has 32 divisors (see below), whose sum is σ = 60165720. Its totient is φ = 10066432.

The previous prime is 25166719. The next prime is 25166753. The reversal of 25166720 is 2766152.

It is a tau number, because it is divible by the number of its divisors (32).

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19022 + ... + 20301.

Almost surely, 2^25166720 is an apocalyptic number.

25166720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25166720 is an abundant number, since it is smaller than the sum of its proper divisors (34999000).

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

25166720 is an equidigital number, since it uses as much as digits as its factorization.

25166720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39342 (or 39330 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 25166720 is about 5016.6442967386. The cubic root of 25166720 is about 293.0503239168.

The spelling of 25166720 in words is "twenty-five million, one hundred sixty-six thousand, seven hundred twenty".