65500590 has 16 divisors (see below), whose sum is σ = 157201488. Its totient is φ = 17466816.

The previous prime is 65500583. The next prime is 65500601. The reversal of 65500590 is 9500556.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 2183353 = 65500590 / (6 + 5 + 5 + 0 + 0 + 5 + 9 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1091647 + ... + 1091706.

It is an arithmetic number, because the mean of its divisors is an integer number (9825093).

Almost surely, 2^65500590 is an apocalyptic number.

65500590 is an abundant number, since it is smaller than the sum of its proper divisors (91700898).

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

65500590 is a wasteful number, since it uses less digits than its factorization.

65500590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2183363.

The product of its (nonzero) digits is 6750, while the sum is 30.

The square root of 65500590 is about 8093.2434783590. The cubic root of 65500590 is about 403.1021092705.

The spelling of 65500590 in words is "sixty-five million, five hundred thousand, five hundred ninety".