65399710866 has 64 divisors (see below), whose sum is σ = 150740352000. Its totient is φ = 18529142976.

The previous prime is 65399710841. The next prime is 65399710879. The reversal of 65399710866 is 66801799356.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3865261 + ... + 3882143.

It is an arithmetic number, because the mean of its divisors is an integer number (2355318000).

Almost surely, 2^65399710866 is an apocalyptic number.

65399710866 is an abundant number, since it is smaller than the sum of its proper divisors (85340641134).

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

65399710866 is a wasteful number, since it uses less digits than its factorization.

65399710866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17663.

The product of its (nonzero) digits is 14696640, while the sum is 60.

The spelling of 65399710866 in words is "sixty-five billion, three hundred ninety-nine million, seven hundred ten thousand, eight hundred sixty-six".