722278566 has 32 divisors (see below), whose sum is σ = 1606942080. Its totient is φ = 240477768.

The previous prime is 722278561. The next prime is 722278577. The reversal of 722278566 is 665872227.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722278561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41605 + ... + 56351.

It is an arithmetic number, because the mean of its divisors is an integer number (50216940).

Almost surely, 2^722278566 is an apocalyptic number.

722278566 is an abundant number, since it is smaller than the sum of its proper divisors (884663514).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

722278566 is a wasteful number, since it uses less digits than its factorization.

722278566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15665 (or 15659 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The square root of 722278566 is about 26875.2407617123. The cubic root of 722278566 is about 897.2254329875.

The spelling of 722278566 in words is "seven hundred twenty-two million, two hundred seventy-eight thousand, five hundred sixty-six".