65990909892 has 24 divisors (see below), whose sum is σ = 153997754400. Its totient is φ = 21994260736.

The previous prime is 65990909857. The next prime is 65990909921. The reversal of 65990909892 is 29890909956.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235917 + ... + 433172.

It is an arithmetic number, because the mean of its divisors is an integer number (6416573100).

Almost surely, 2^65990909892 is an apocalyptic number.

It is an amenable number.

65990909892 is an abundant number, since it is smaller than the sum of its proper divisors (88006844508).

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

65990909892 is a wasteful number, since it uses less digits than its factorization.

65990909892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677315 (or 677313 counting only the distinct ones).

The product of its (nonzero) digits is 28343520, while the sum is 66.

The spelling of 65990909892 in words is "sixty-five billion, nine hundred ninety million, nine hundred nine thousand, eight hundred ninety-two".