65998900 has 36 divisors (see below), whose sum is σ = 156240000. Its totient is φ = 23999200.

The previous prime is 65998883. The next prime is 65998903. The reversal of 65998900 is 989956.

It is a happy number.

65998900 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65998903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28900 + ... + 31099.

It is an arithmetic number, because the mean of its divisors is an integer number (4340000).

Almost surely, 2^65998900 is an apocalyptic number.

It is an amenable number.

65998900 is an abundant number, since it is smaller than the sum of its proper divisors (90241100).

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

65998900 is a wasteful number, since it uses less digits than its factorization.

65998900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60024 (or 60017 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 46.

The square root of 65998900 is about 8123.9707040338. The cubic root of 65998900 is about 404.1217569164.

The spelling of 65998900 in words is "sixty-five million, nine hundred ninety-eight thousand, nine hundred".