166977745 has 16 divisors (see below), whose sum is σ = 220760640. Its totient is φ = 120232000.

The previous prime is 166977743. The next prime is 166977751. The reversal of 166977745 is 547779661.

It is not a de Polignac number, because 166977745 - 2¹ = 166977743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166977692 and 166977701.

It is not an unprimeable number, because it can be changed into a prime (166977743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9475 + ... + 20584.

It is an arithmetic number, because the mean of its divisors is an integer number (13797540).

Almost surely, 2^166977745 is an apocalyptic number.

It is an amenable number.

166977745 is a deficient number, since it is larger than the sum of its proper divisors (53782895).

166977745 is a wasteful number, since it uses less digits than its factorization.

166977745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30176.

The product of its digits is 2222640, while the sum is 52.

The square root of 166977745 is about 12921.9868828288. The cubic root of 166977745 is about 550.6633813604.

It can be divided in two parts, 16697 and 7745, that added together give a palindrome (24442).

The spelling of 166977745 in words is "one hundred sixty-six million, nine hundred seventy-seven thousand, seven hundred forty-five".