166606677 has 12 divisors (see below), whose sum is σ = 244600044. Its totient is φ = 109249920.

The previous prime is 166606637. The next prime is 166606703. The reversal of 166606677 is 776606661.

It can be written as a sum of positive squares in 2 ways, for example, as 55219761 + 111386916 = 7431^2 + 10554^2 .

It is not a de Polignac number, because 166606677 - 2¹¹ = 166604629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166606607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 151188 + ... + 152285.

It is an arithmetic number, because the mean of its divisors is an integer number (20383337).

Almost surely, 2^166606677 is an apocalyptic number.

It is an amenable number.

166606677 is a deficient number, since it is larger than the sum of its proper divisors (77993367).

166606677 is a wasteful number, since it uses less digits than its factorization.

166606677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303540 (or 303537 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 45.

The square root of 166606677 is about 12907.6208884519. The cubic root of 166606677 is about 550.2551730540.

The spelling of 166606677 in words is "one hundred sixty-six million, six hundred six thousand, six hundred seventy-seven".