66342742866 has 24 divisors (see below), whose sum is σ = 144359539740. Its totient is φ = 22019335296.

The previous prime is 66342742861. The next prime is 66342742877. The reversal of 66342742866 is 66824724366.

66342742866 is a `hidden beast` number, since 66 + 34 + 274 + 286 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 64577482641 + 1765260225 = 254121^2 + 42015^2 .

It is not an unprimeable number, because it can be changed into a prime (66342742861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7905051 + ... + 7913438.

Almost surely, 2^66342742866 is an apocalyptic number.

66342742866 is an abundant number, since it is smaller than the sum of its proper divisors (78016796874).

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

66342742866 is a wasteful number, since it uses less digits than its factorization.

66342742866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15818730 (or 15818727 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 54.

The spelling of 66342742866 in words is "sixty-six billion, three hundred forty-two million, seven hundred forty-two thousand, eight hundred sixty-six".