722777081 has 16 divisors (see below), whose sum is σ = 833246400. Its totient is φ = 621338688.

The previous prime is 722777021. The next prime is 722777113. The reversal of 722777081 is 180777227.

It is a cyclic number.

It is not a de Polignac number, because 722777081 - 2¹⁸ = 722514937 is a prime.

It is a super-2 number, since 2×722777081² = 1044813417637761122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722777021) 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, 10226 + ... + 39371.

It is an arithmetic number, because the mean of its divisors is an integer number (52077900).

Almost surely, 2^722777081 is an apocalyptic number.

It is an amenable number.

722777081 is a deficient number, since it is larger than the sum of its proper divisors (110469319).

722777081 is a wasteful number, since it uses less digits than its factorization.

722777081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49688.

The product of its (nonzero) digits is 76832, while the sum is 41.

The square root of 722777081 is about 26884.5137765220. The cubic root of 722777081 is about 897.4318064899.

The spelling of 722777081 in words is "seven hundred twenty-two million, seven hundred seventy-seven thousand, eighty-one".