65671277217656 has 16 divisors (see below), whose sum is σ = 134327612490840. Its totient is φ = 29850580553440.

The previous prime is 65671277217653. The next prime is 65671277217671.

65671277217656 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65671277217653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 373132256831 + ... + 373132257006.

Almost surely, 2^{65671277217656} is an apocalyptic number.

It is an amenable number.

65671277217656 is an abundant number, since it is smaller than the sum of its proper divisors (68656335273184).

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

65671277217656 is a wasteful number, since it uses less digits than its factorization.

65671277217656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746264513854 (or 746264513850 counting only the distinct ones).

The product of its digits is 311169600, while the sum is 68.

The spelling of 65671277217656 in words is "sixty-five trillion, six hundred seventy-one billion, two hundred seventy-seven million, two hundred seventeen thousand, six hundred fifty-six".