168016667961 has 4 divisors (see below), whose sum is σ = 224022223952. Its totient is φ = 112011111972.

The previous prime is 168016667933. The next prime is 168016667971. The reversal of 168016667961 is 169766610861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 168016667961 - 2²¹ = 168014570809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168016667921) 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, 28002777991 + ... + 28002777996.

It is an arithmetic number, because the mean of its divisors is an integer number (56005555988).

Almost surely, 2^168016667961 is an apocalyptic number.

It is an amenable number.

168016667961 is a deficient number, since it is larger than the sum of its proper divisors (56005555991).

168016667961 is an equidigital number, since it uses as much as digits as its factorization.

168016667961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56005555990.

The product of its (nonzero) digits is 3919104, while the sum is 57.

The spelling of 168016667961 in words is "one hundred sixty-eight billion, sixteen million, six hundred sixty-seven thousand, nine hundred sixty-one".