2172277667 has 4 divisors (see below), whose sum is σ = 2482603056. Its totient is φ = 1861952280.

The previous prime is 2172277637. The next prime is 2172277669. The reversal of 2172277667 is 7667722712.

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 2172277667 - 2¹⁴ = 2172261283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2172277669) 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, 155162684 + ... + 155162697.

It is an arithmetic number, because the mean of its divisors is an integer number (620650764).

Almost surely, 2^2172277667 is an apocalyptic number.

2172277667 is a deficient number, since it is larger than the sum of its proper divisors (310325389).

2172277667 is an equidigital number, since it uses as much as digits as its factorization.

2172277667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310325388.

The product of its digits is 691488, while the sum is 47.

The square root of 2172277667 is about 46607.6996535980. The cubic root of 2172277667 is about 1295.1053947405.

The spelling of 2172277667 in words is "two billion, one hundred seventy-two million, two hundred seventy-seven thousand, six hundred sixty-seven".