166706867 has 4 divisors (see below), whose sum is σ = 171212496. Its totient is φ = 162201240.

The previous prime is 166706857. The next prime is 166706873. The reversal of 166706867 is 768607661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 768607661 = 22973 ⋅33457.

It is a cyclic number.

It is not a de Polignac number, because 166706867 - 2¹⁰ = 166705843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166706807) 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, 2252759 + ... + 2252832.

It is an arithmetic number, because the mean of its divisors is an integer number (42803124).

Almost surely, 2^166706867 is an apocalyptic number.

166706867 is a deficient number, since it is larger than the sum of its proper divisors (4505629).

166706867 is an equidigital number, since it uses as much as digits as its factorization.

166706867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4505628.

The product of its (nonzero) digits is 508032, while the sum is 47.

The square root of 166706867 is about 12911.5013456995. The cubic root of 166706867 is about 550.3654507842.

The spelling of 166706867 in words is "one hundred sixty-six million, seven hundred six thousand, eight hundred sixty-seven".