166687017 has 16 divisors (see below), whose sum is σ = 260195712. Its totient is φ = 92926080.

The previous prime is 166687009. The next prime is 166687021. The reversal of 166687017 is 710786661.

It is not a de Polignac number, because 166687017 - 2³ = 166687009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166687017.

It is not an unprimeable number, because it can be changed into a prime (166687007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95938 + ... + 97659.

It is an arithmetic number, because the mean of its divisors is an integer number (16262232).

Almost surely, 2^166687017 is an apocalyptic number.

It is an amenable number.

166687017 is a deficient number, since it is larger than the sum of its proper divisors (93508695).

166687017 is a wasteful number, since it uses less digits than its factorization.

166687017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193648.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 166687017 is about 12910.7326283213. The cubic root of 166687017 is about 550.3436056776.

The spelling of 166687017 in words is "one hundred sixty-six million, six hundred eighty-seven thousand, seventeen".