65660040960 has 72 divisors (see below), whose sum is σ = 209701768080. Its totient is φ = 17509343232.

The previous prime is 65660040949. The next prime is 65660040991. The reversal of 65660040960 is 6904006656.

It is a super-2 number, since 2×65660040960² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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, 8545645 + ... + 8553324.

Almost surely, 2^65660040960 is an apocalyptic number.

65660040960 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65660040960 is an abundant number, since it is smaller than the sum of its proper divisors (144041727120).

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

65660040960 is a wasteful number, since it uses less digits than its factorization.

65660040960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17098993 (or 17098979 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 42.

The spelling of 65660040960 in words is "sixty-five billion, six hundred sixty million, forty thousand, nine hundred sixty".