65945980 has 12 divisors (see below), whose sum is σ = 138486600. Its totient is φ = 26378384.

The previous prime is 65945969. The next prime is 65945989. The reversal of 65945980 is 8954956.

It is a self number, because there is not a number n which added to its sum of digits gives 65945980.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65945989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1648630 + ... + 1648669.

It is an arithmetic number, because the mean of its divisors is an integer number (11540550).

Almost surely, 2^65945980 is an apocalyptic number.

It is an amenable number.

65945980 is an abundant number, since it is smaller than the sum of its proper divisors (72540620).

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

65945980 is a wasteful number, since it uses less digits than its factorization.

65945980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3297308 (or 3297306 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 46.

The square root of 65945980 is about 8120.7130228817. The cubic root of 65945980 is about 404.0137155099.

The spelling of 65945980 in words is "sixty-five million, nine hundred forty-five thousand, nine hundred eighty".