66116556306 has 12 divisors (see below), whose sum is σ = 143252538702. Its totient is φ = 22038852096.

The previous prime is 66116556293. The next prime is 66116556343. The reversal of 66116556306 is 60365561166.

66116556306 is a `hidden beast` number, since 6 + 6 + 1 + 1 + 6 + 5 + 5 + 630 + 6 = 666.

66116556306 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 35152875081 + 30963681225 = 187491^2 + 175965^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1836570991 + ... + 1836571026.

Almost surely, 2^66116556306 is an apocalyptic number.

66116556306 is an abundant number, since it is smaller than the sum of its proper divisors (77135982396).

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

66116556306 is a wasteful number, since it uses less digits than its factorization.

66116556306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3673142025 (or 3673142022 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 45.

The spelling of 66116556306 in words is "sixty-six billion, one hundred sixteen million, five hundred fifty-six thousand, three hundred six".