166660677 has 6 divisors (see below), whose sum is σ = 240732102. Its totient is φ = 111107112.

The previous prime is 166660667. The next prime is 166660693. The reversal of 166660677 is 776066661.

166660677 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 165019716 + 1640961 = 12846^2 + 1281^2 .

It is not a de Polignac number, because 166660677 - 2²⁰ = 165612101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166660607) 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, 9258918 + ... + 9258935.

It is an arithmetic number, because the mean of its divisors is an integer number (40122017).

Almost surely, 2^166660677 is an apocalyptic number.

It is an amenable number.

166660677 is a deficient number, since it is larger than the sum of its proper divisors (74071425).

166660677 is a wasteful number, since it uses less digits than its factorization.

166660677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18517859 (or 18517856 counting only the distinct ones).

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

The square root of 166660677 is about 12909.7125064813. The cubic root of 166660677 is about 550.3146155889.

The spelling of 166660677 in words is "one hundred sixty-six million, six hundred sixty thousand, six hundred seventy-seven".