66566612316 has 24 divisors (see below), whose sum is σ = 155361919104. Its totient is φ = 22183181680.

The previous prime is 66566612237. The next prime is 66566612317. The reversal of 66566612316 is 61321666566.

It is a super-2 number, since 2×66566612316² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66566612317) 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, 662250 + ... + 756113.

It is an arithmetic number, because the mean of its divisors is an integer number (6473413296).

Almost surely, 2^66566612316 is an apocalyptic number.

It is an amenable number.

66566612316 is an abundant number, since it is smaller than the sum of its proper divisors (88795306788).

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

66566612316 is a wasteful number, since it uses less digits than its factorization.

66566612316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1422281 (or 1422279 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 48.

The spelling of 66566612316 in words is "sixty-six billion, five hundred sixty-six million, six hundred twelve thousand, three hundred sixteen".