65661336024 has 16 divisors (see below), whose sum is σ = 164153340120. Its totient is φ = 21887112000.

The previous prime is 65661336017. The next prime is 65661336043. The reversal of 65661336024 is 42063316656.

It is a happy number.

It is a super-2 number, since 2×65661336024² (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 3 ways as a sum of consecutive naturals, for example, 1367944477 + ... + 1367944524.

Almost surely, 2^65661336024 is an apocalyptic number.

It is an amenable number.

65661336024 is an abundant number, since it is smaller than the sum of its proper divisors (98492004096).

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

65661336024 is a wasteful number, since it uses less digits than its factorization.

65661336024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2735889010 (or 2735889006 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 42.

The spelling of 65661336024 in words is "sixty-five billion, six hundred sixty-one million, three hundred thirty-six thousand, twenty-four".