6664164722 has 16 divisors (see below), whose sum is σ = 10163021400. Its totient is φ = 3276522240.

The previous prime is 6664164701. The next prime is 6664164737. The reversal of 6664164722 is 2274614666.

It can be written as a sum of positive squares in 4 ways, for example, as 3008632201 + 3655532521 = 54851^2 + 60461^2 .

It is a super-2 number, since 2×6664164722² = 88822182883898674568, which contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 642554 + ... + 652842.

Almost surely, 2^6664164722 is an apocalyptic number.

6664164722 is a deficient number, since it is larger than the sum of its proper divisors (3498856678).

6664164722 is a wasteful number, since it uses less digits than its factorization.

6664164722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15661.

The product of its digits is 580608, while the sum is 44.

The square root of 6664164722 is about 81634.3354355261. The cubic root of 6664164722 is about 1881.8365862954.

The spelling of 6664164722 in words is "six billion, six hundred sixty-four million, one hundred sixty-four thousand, seven hundred twenty-two".