65505870 has 24 divisors (see below), whose sum is σ = 170315496. Its totient is φ = 17468208.

The previous prime is 65505779. The next prime is 65505889. The reversal of 65505870 is 7850556.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 363832 + ... + 364011.

It is an arithmetic number, because the mean of its divisors is an integer number (7096479).

Almost surely, 2^65505870 is an apocalyptic number.

65505870 is an abundant number, since it is smaller than the sum of its proper divisors (104809626).

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

65505870 is a wasteful number, since it uses less digits than its factorization.

65505870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727856 (or 727853 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 36.

The square root of 65505870 is about 8093.5696698058. The cubic root of 65505870 is about 403.1129403279.

The spelling of 65505870 in words is "sixty-five million, five hundred five thousand, eight hundred seventy".