66565214956 has 24 divisors (see below), whose sum is σ = 118786971744. Its totient is φ = 32627137920.

The previous prime is 66565214953. The next prime is 66565214959. The reversal of 66565214956 is 65941256566.

It is an interprime number because it is at equal distance from previous prime (66565214953) and next prime (66565214959).

It is a junction number, because it is equal to n+sod(n) for n = 66565214897 and 66565214906.

It is not an unprimeable number, because it can be changed into a prime (66565214953) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121321 + ... + 384511.

It is an arithmetic number, because the mean of its divisors is an integer number (4949457156).

Almost surely, 2^66565214956 is an apocalyptic number.

It is an amenable number.

66565214956 is a deficient number, since it is larger than the sum of its proper divisors (52221756788).

66565214956 is a wasteful number, since it uses less digits than its factorization.

66565214956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264441 (or 264439 counting only the distinct ones).

The product of its digits is 11664000, while the sum is 55.

The spelling of 66565214956 in words is "sixty-six billion, five hundred sixty-five million, two hundred fourteen thousand, nine hundred fifty-six".