65788640722 has 48 divisors (see below), whose sum is σ = 123133469760. Its totient is φ = 25790044896.

The previous prime is 65788640717. The next prime is 65788640773. The reversal of 65788640722 is 22704688756.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77868 + ... + 370999.

It is an arithmetic number, because the mean of its divisors is an integer number (2565280620).

Almost surely, 2^65788640722 is an apocalyptic number.

65788640722 is a deficient number, since it is larger than the sum of its proper divisors (57344829038).

65788640722 is a wasteful number, since it uses less digits than its factorization.

65788640722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448943 (or 448924 counting only the distinct ones).

The product of its (nonzero) digits is 9031680, while the sum is 55.

The spelling of 65788640722 in words is "sixty-five billion, seven hundred eighty-eight million, six hundred forty thousand, seven hundred twenty-two".