166868004967 has 4 divisors (see below), whose sum is σ = 168588293776. Its totient is φ = 165147716160.

The previous prime is 166868004959. The next prime is 166868004971. The reversal of 166868004967 is 769400868661.

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 166868004967 - 2³ = 166868004959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166868004907) 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, 860144259 + ... + 860144452.

It is an arithmetic number, because the mean of its divisors is an integer number (42147073444).

Almost surely, 2^166868004967 is an apocalyptic number.

166868004967 is a deficient number, since it is larger than the sum of its proper divisors (1720288809).

166868004967 is an equidigital number, since it uses as much as digits as its factorization.

166868004967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1720288808.

The product of its (nonzero) digits is 20901888, while the sum is 61.

The spelling of 166868004967 in words is "one hundred sixty-six billion, eight hundred sixty-eight million, four thousand, nine hundred sixty-seven".