66166606242 has 40 divisors (see below), whose sum is σ = 161740597392. Its totient is φ = 20050486200.

The previous prime is 66166606237. The next prime is 66166606307. The reversal of 66166606242 is 24260666166.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18563484 + ... + 18567047.

Almost surely, 2^66166606242 is an apocalyptic number.

66166606242 is an abundant number, since it is smaller than the sum of its proper divisors (95573991150).

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

66166606242 is a wasteful number, since it uses less digits than its factorization.

66166606242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37130556 (or 37130547 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 45.

The spelling of 66166606242 in words is "sixty-six billion, one hundred sixty-six million, six hundred six thousand, two hundred forty-two".