166211922239 has 4 divisors (see below), whose sum is σ = 181322097000. Its totient is φ = 151101747480.

The previous prime is 166211922193. The next prime is 166211922277. The reversal of 166211922239 is 932229112661.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 166211922239 - 2¹⁶ = 166211856703 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166211922239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166211922299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7555087364 + ... + 7555087385.

It is an arithmetic number, because the mean of its divisors is an integer number (45330524250).

Almost surely, 2^166211922239 is an apocalyptic number.

166211922239 is a deficient number, since it is larger than the sum of its proper divisors (15110174761).

166211922239 is a wasteful number, since it uses less digits than its factorization.

166211922239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15110174760.

The product of its digits is 139968, while the sum is 44.

The spelling of 166211922239 in words is "one hundred sixty-six billion, two hundred eleven million, nine hundred twenty-two thousand, two hundred thirty-nine".