65880090 has 48 divisors (see below), whose sum is σ = 171849600. Its totient is φ = 17510496.

The previous prime is 65880079. The next prime is 65880097. The reversal of 65880090 is 9008856.

It is not an unprimeable number, because it can be changed into a prime (65880097) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31291 + ... + 33329.

It is an arithmetic number, because the mean of its divisors is an integer number (3580200).

Almost surely, 2^65880090 is an apocalyptic number.

65880090 is an abundant number, since it is smaller than the sum of its proper divisors (105969510).

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

65880090 is a wasteful number, since it uses less digits than its factorization.

65880090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2411 (or 2408 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 65880090 is about 8116.6550992388. The cubic root of 65880090 is about 403.8791137516.

The spelling of 65880090 in words is "sixty-five million, eight hundred eighty thousand, ninety".