166684867 has 4 divisors (see below), whose sum is σ = 166716520. Its totient is φ = 166653216.

The previous prime is 166684849. The next prime is 166684901. The reversal of 166684867 is 768486661.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 166684867 - 2²⁷ = 32467139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166684267) 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, 5817 + ... + 19162.

It is an arithmetic number, because the mean of its divisors is an integer number (41679130).

Almost surely, 2^166684867 is an apocalyptic number.

166684867 is a deficient number, since it is larger than the sum of its proper divisors (31653).

166684867 is an equidigital number, since it uses as much as digits as its factorization.

166684867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31652.

The product of its digits is 2322432, while the sum is 52.

The square root of 166684867 is about 12910.6493639941. The cubic root of 166684867 is about 550.3412394788.

The spelling of 166684867 in words is "one hundred sixty-six million, six hundred eighty-four thousand, eight hundred sixty-seven".