7722170665 has 16 divisors (see below), whose sum is σ = 10641078720. Its totient is φ = 5320537920.

The previous prime is 7722170623. The next prime is 7722170669. The reversal of 7722170665 is 5660712277.

It is not a de Polignac number, because 7722170665 - 2⁷ = 7722170537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7722170669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3693774 + ... + 3695863.

It is an arithmetic number, because the mean of its divisors is an integer number (665067420).

Almost surely, 2^7722170665 is an apocalyptic number.

It is an amenable number.

7722170665 is a deficient number, since it is larger than the sum of its proper divisors (2918908055).

7722170665 is a wasteful number, since it uses less digits than its factorization.

7722170665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7389672.

The product of its (nonzero) digits is 246960, while the sum is 43.

The square root of 7722170665 is about 87875.8821577343. The cubic root of 7722170665 is about 1976.5742436582.

The spelling of 7722170665 in words is "seven billion, seven hundred twenty-two million, one hundred seventy thousand, six hundred sixty-five".