166682477 has 4 divisors (see below), whose sum is σ = 179504220. Its totient is φ = 153860736.

The previous prime is 166682471. The next prime is 166682489. The reversal of 166682477 is 774286661.

It is a happy number.

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 112232836 + 54449641 = 10594^2 + 7379^2 .

It is a cyclic number.

It is not a de Polignac number, because 166682477 - 2⁶ = 166682413 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 (166682471) 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, 6410852 + ... + 6410877.

It is an arithmetic number, because the mean of its divisors is an integer number (44876055).

Almost surely, 2^166682477 is an apocalyptic number.

It is an amenable number.

166682477 is a deficient number, since it is larger than the sum of its proper divisors (12821743).

166682477 is a wasteful number, since it uses less digits than its factorization.

166682477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12821742.

The product of its digits is 677376, while the sum is 47.

The square root of 166682477 is about 12910.5568044140. The cubic root of 166682477 is about 550.3386091224.

The spelling of 166682477 in words is "one hundred sixty-six million, six hundred eighty-two thousand, four hundred seventy-seven".