65387650866 has 16 divisors (see below), whose sum is σ = 136461184704. Its totient is φ = 20848236464.

The previous prime is 65387650841. The next prime is 65387650877. The reversal of 65387650866 is 66805678356.

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, 236911641 + ... + 236911916.

It is an arithmetic number, because the mean of its divisors is an integer number (8528824044).

Almost surely, 2^65387650866 is an apocalyptic number.

65387650866 is an abundant number, since it is smaller than the sum of its proper divisors (71073533838).

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

65387650866 is a wasteful number, since it uses less digits than its factorization.

65387650866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473823585.

The product of its (nonzero) digits is 43545600, while the sum is 60.

The spelling of 65387650866 in words is "sixty-five billion, three hundred eighty-seven million, six hundred fifty thousand, eight hundred sixty-six".