25760660 has 12 divisors (see below), whose sum is σ = 54097428. Its totient is φ = 10304256.

The previous prime is 25760591. The next prime is 25760687. The reversal of 25760660 is 6606752.

It can be written as a sum of positive squares in 2 ways, for example, as 4545424 + 21215236 = 2132^2 + 4606^2 .

It is a super-2 number, since 2×25760660² = 1327223207271200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 643997 + ... + 644036.

It is an arithmetic number, because the mean of its divisors is an integer number (4508119).

Almost surely, 2^25760660 is an apocalyptic number.

25760660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25760660 is an abundant number, since it is smaller than the sum of its proper divisors (28336768).

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

25760660 is a wasteful number, since it uses less digits than its factorization.

25760660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288042 (or 1288040 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 25760660 is about 5075.4960348719. The cubic root of 25760660 is about 295.3377726381.

The spelling of 25760660 in words is "twenty-five million, seven hundred sixty thousand, six hundred sixty".