65940980 has 24 divisors (see below), whose sum is σ = 158258688. Its totient is φ = 22608288.

The previous prime is 65940971. The next prime is 65940989. The reversal of 65940980 is 8904956.

It is an interprime number because it is at equal distance from previous prime (65940971) and next prime (65940989).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65940989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235364 + ... + 235643.

It is an arithmetic number, because the mean of its divisors is an integer number (6594112).

Almost surely, 2^65940980 is an apocalyptic number.

It is an amenable number.

65940980 is an abundant number, since it is smaller than the sum of its proper divisors (92317708).

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

65940980 is a wasteful number, since it uses less digits than its factorization.

65940980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471023 (or 471021 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 65940980 is about 8120.4051623056. The cubic root of 65940980 is about 404.0035045280.

The spelling of 65940980 in words is "sixty-five million, nine hundred forty thousand, nine hundred eighty".