166009958 has 16 divisors (see below), whose sum is σ = 251701296. Its totient is φ = 82114560.

The previous prime is 166009933. The next prime is 166009997. The reversal of 166009958 is 859900661.

166009958 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77510 + ... + 79622.

It is an arithmetic number, because the mean of its divisors is an integer number (15731331).

Almost surely, 2^166009958 is an apocalyptic number.

166009958 is a deficient number, since it is larger than the sum of its proper divisors (85691338).

166009958 is a wasteful number, since it uses less digits than its factorization.

166009958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2519.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 166009958 is about 12884.4851662765. The cubic root of 166009958 is about 549.5974553119.

The spelling of 166009958 in words is "one hundred sixty-six million, nine thousand, nine hundred fifty-eight".