6722169556 has 12 divisors (see below), whose sum is σ = 11772374292. Its totient is φ = 3358634048.

The previous prime is 6722169551. The next prime is 6722169577. The reversal of 6722169556 is 6559612276.

It can be written as a sum of positive squares in 2 ways, for example, as 4595484100 + 2126685456 = 67790^2 + 46116^2 .

It is a super-2 number, since 2×6722169556² = 90375127079226474272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6722169551) 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, 606505 + ... + 617488.

It is an arithmetic number, because the mean of its divisors is an integer number (981031191).

Almost surely, 2^6722169556 is an apocalyptic number.

It is an amenable number.

6722169556 is a deficient number, since it is larger than the sum of its proper divisors (5050204736).

6722169556 is a wasteful number, since it uses less digits than its factorization.

6722169556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1225370 (or 1225368 counting only the distinct ones).

The product of its digits is 1360800, while the sum is 49.

The square root of 6722169556 is about 81988.8379964005. The cubic root of 6722169556 is about 1887.2806516502.

The spelling of 6722169556 in words is "six billion, seven hundred twenty-two million, one hundred sixty-nine thousand, five hundred fifty-six".