65997279956 has 12 divisors (see below), whose sum is σ = 115523736468. Its totient is φ = 32990498112.

The previous prime is 65997279947. The next prime is 65997279983.

65997279956 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 27142562500 + 38854717456 = 164750^2 + 197116^2 .

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, 2017211 + ... + 2049666.

It is an arithmetic number, because the mean of its divisors is an integer number (9626978039).

Almost surely, 2^65997279956 is an apocalyptic number.

It is an amenable number.

65997279956 is a deficient number, since it is larger than the sum of its proper divisors (49526456512).

65997279956 is a wasteful number, since it uses less digits than its factorization.

65997279956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4070938 (or 4070936 counting only the distinct ones).

The product of its digits is 578680200, while the sum is 74.

The spelling of 65997279956 in words is "sixty-five billion, nine hundred ninety-seven million, two hundred seventy-nine thousand, nine hundred fifty-six".