65881739668 has 12 divisors (see below), whose sum is σ = 115297386400. Its totient is φ = 32939629272.

The previous prime is 65881739621. The next prime is 65881739681. The reversal of 65881739668 is 86693718856.

It is a hoax number, since the sum of its digits (67) coincides with the sum of the digits of its distinct prime factors.

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, 185046 + ... + 407437.

Almost surely, 2^65881739668 is an apocalyptic number.

It is an amenable number.

65881739668 is a deficient number, since it is larger than the sum of its proper divisors (49415646732).

65881739668 is a wasteful number, since it uses less digits than its factorization.

65881739668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620286 (or 620284 counting only the distinct ones).

The product of its digits is 104509440, while the sum is 67.

The spelling of 65881739668 in words is "sixty-five billion, eight hundred eighty-one million, seven hundred thirty-nine thousand, six hundred sixty-eight".