52166243666 has 32 divisors (see below), whose sum is σ = 80227749888. Its totient is φ = 25428260880.

The previous prime is 52166243659. The next prime is 52166243683. The reversal of 52166243666 is 66634266125.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a self number, because there is not a number n which added to its sum of digits gives 52166243666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36658631 + ... + 36660053.

It is an arithmetic number, because the mean of its divisors is an integer number (2507117184).

Almost surely, 2^52166243666 is an apocalyptic number.

52166243666 is a deficient number, since it is larger than the sum of its proper divisors (28061506222).

52166243666 is a wasteful number, since it uses less digits than its factorization.

52166243666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2726.

The product of its digits is 1866240, while the sum is 47.

The spelling of 52166243666 in words is "fifty-two billion, one hundred sixty-six million, two hundred forty-three thousand, six hundred sixty-six".