65673999937656 has 96 divisors (see below), whose sum is σ = 199281056410800. Its totient is φ = 19363341496320.

The previous prime is 65673999937643. The next prime is 65673999937661.

65673999937656 is a `hidden beast` number, since 6 + 5 + 67 + 3 + 99 + 99 + 376 + 5 + 6 = 666.

65673999937656 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×65673999937656² (a number of 28 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 23 ways as a sum of consecutive naturals, for example, 1120534441 + ... + 1120593048.

Almost surely, 2^{65673999937656} is an apocalyptic number.

65673999937656 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

65673999937656 is an abundant number, since it is smaller than the sum of its proper divisors (133607056473144).

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

65673999937656 is a wasteful number, since it uses less digits than its factorization.

65673999937656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2241127549 (or 2241127542 counting only the distinct ones).

The product of its digits is 93746192400, while the sum is 90.

The spelling of 65673999937656 in words is "sixty-five trillion, six hundred seventy-three billion, nine hundred ninety-nine million, nine hundred thirty-seven thousand, six hundred fifty-six".