65257980 has 48 divisors (see below), whose sum is σ = 183521184. Its totient is φ = 17326080.

The previous prime is 65257967. The next prime is 65257981. The reversal of 65257980 is 8975256.

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 (65257981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12204 + ... + 16716.

It is an arithmetic number, because the mean of its divisors is an integer number (3823358).

Almost surely, 2^65257980 is an apocalyptic number.

65257980 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65257980 is an abundant number, since it is smaller than the sum of its proper divisors (118263204).

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

65257980 is a wasteful number, since it uses less digits than its factorization.

65257980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4766 (or 4764 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 42.

The square root of 65257980 is about 8078.2411451999. The cubic root of 65257980 is about 402.6038053828.

The spelling of 65257980 in words is "sixty-five million, two hundred fifty-seven thousand, nine hundred eighty".