65663928138 has 16 divisors (see below), whose sum is σ = 134122066560. Its totient is φ = 21422274336.

The previous prime is 65663928133. The next prime is 65663928139. The reversal of 65663928138 is 83182936656.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (65663928133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116425123 + ... + 116425686.

It is an arithmetic number, because the mean of its divisors is an integer number (8382629160).

Almost surely, 2^65663928138 is an apocalyptic number.

65663928138 is an abundant number, since it is smaller than the sum of its proper divisors (68458138422).

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

65663928138 is a wasteful number, since it uses less digits than its factorization.

65663928138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232850861.

The product of its digits is 11197440, while the sum is 57.

The spelling of 65663928138 in words is "sixty-five billion, six hundred sixty-three million, nine hundred twenty-eight thousand, one hundred thirty-eight".