166532772807 has 12 divisors (see below), whose sum is σ = 240872851960. Its totient is φ = 110871611568.

The previous prime is 166532772733. The next prime is 166532772821. The reversal of 166532772807 is 708277235661.

It is a happy number.

166532772807 is a `hidden beast` number, since 16 + 6 + 532 + 77 + 28 + 0 + 7 = 666.

It is not a de Polignac number, because 166532772807 - 2¹¹ = 166532770759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166532772407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12512728 + ... + 12526029.

Almost surely, 2^166532772807 is an apocalyptic number.

166532772807 is a deficient number, since it is larger than the sum of its proper divisors (74340079153).

166532772807 is a wasteful number, since it uses less digits than its factorization.

166532772807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25039502 (or 25039499 counting only the distinct ones).

The product of its (nonzero) digits is 5927040, while the sum is 54.

The spelling of 166532772807 in words is "one hundred sixty-six billion, five hundred thirty-two million, seven hundred seventy-two thousand, eight hundred seven".