66166247052 has 18 divisors (see below), whose sum is σ = 167253569028. Its totient is φ = 22055415672.

The previous prime is 66166246973. The next prime is 66166247099. The reversal of 66166247052 is 25074266166.

66166247052 is a `hidden beast` number, since 6 + 6 + 16 + 624 + 7 + 0 + 5 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 66166246989 and 66166247007.

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, 918975618 + ... + 918975689.

It is an arithmetic number, because the mean of its divisors is an integer number (9291864946).

Almost surely, 2^66166247052 is an apocalyptic number.

It is an amenable number.

66166247052 is an abundant number, since it is smaller than the sum of its proper divisors (101087321976).

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

66166247052 is a wasteful number, since it uses less digits than its factorization.

66166247052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1837951317 (or 1837951312 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 66166247052 in words is "sixty-six billion, one hundred sixty-six million, two hundred forty-seven thousand, fifty-two".