166475977 has 4 divisors (see below), whose sum is σ = 168124356. Its totient is φ = 164827600.

The previous prime is 166475963. The next prime is 166475999. The reversal of 166475977 is 779574661.

166475977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 91757241 + 74718736 = 9579^2 + 8644^2 .

It is a cyclic number.

It is not a de Polignac number, because 166475977 - 2¹¹ = 166473929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166475957) 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, 824038 + ... + 824239.

It is an arithmetic number, because the mean of its divisors is an integer number (42031089).

Almost surely, 2^166475977 is an apocalyptic number.

It is an amenable number.

166475977 is a deficient number, since it is larger than the sum of its proper divisors (1648379).

166475977 is a wasteful number, since it uses less digits than its factorization.

166475977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1648378.

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

The square root of 166475977 is about 12902.5569946426. The cubic root of 166475977 is about 550.1112469184. Note that the first 3 decimals are identical.

The spelling of 166475977 in words is "one hundred sixty-six million, four hundred seventy-five thousand, nine hundred seventy-seven".