25977660 has 24 divisors (see below), whose sum is σ = 72737616. Its totient is φ = 6927360.

The previous prime is 25977629. The next prime is 25977661. The reversal of 25977660 is 6677952.

It is a happy number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25977661) 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, 216421 + ... + 216540.

It is an arithmetic number, because the mean of its divisors is an integer number (3030734).

Almost surely, 2^25977660 is an apocalyptic number.

25977660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25977660 is an abundant number, since it is smaller than the sum of its proper divisors (46759956).

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

25977660 is a wasteful number, since it uses less digits than its factorization.

25977660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432973 (or 432971 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 42.

The square root of 25977660 is about 5096.8284255996. The cubic root of 25977660 is about 296.1647336017.

The spelling of 25977660 in words is "twenty-five million, nine hundred seventy-seven thousand, six hundred sixty".