166977 has 6 divisors (see below), whose sum is σ = 241202. Its totient is φ = 111312.

The previous prime is 166973. The next prime is 166979. The reversal of 166977 is 779661.

It can be written as a sum of positive squares in only one way, i.e., 104976 + 62001 = 324^2 + 249^2 .

It is not a de Polignac number, because 166977 - 2² = 166973 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a zygodrome in base 3.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 166977.

It is not an unprimeable number, because it can be changed into a prime (166973) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9268 + ... + 9285.

2¹⁶⁶⁹⁷⁷ is an apocalyptic number.

It is an amenable number.

166977 is a deficient number, since it is larger than the sum of its proper divisors (74225).

166977 is a wasteful number, since it uses less digits than its factorization.

166977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18559 (or 18556 counting only the distinct ones).

The product of its digits is 15876, while the sum is 36.

The square root of 166977 is about 408.6281928600. The cubic root of 166977 is about 55.0662562399.

The spelling of 166977 in words is "one hundred sixty-six thousand, nine hundred seventy-seven".