722166120 has 384 divisors, whose sum is σ = 2777392800. Its totient is φ = 161021952.

The previous prime is 722166119. The next prime is 722166127. The reversal of 722166120 is 21661227.

It can be written as a sum of positive squares in 16 ways, for example, as 3175524 + 718990596 = 1782^2 + 26814^2 .

It is not an unprimeable number, because it can be changed into a prime (722166127) 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 95 ways as a sum of consecutive naturals, for example, 2307084 + ... + 2307396.

Almost surely, 2^722166120 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 722166120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1388696400).

722166120 is an abundant number, since it is smaller than the sum of its proper divisors (2055226680).

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

722166120 is a wasteful number, since it uses less digits than its factorization.

722166120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 722166120 is about 26873.1486804208. The cubic root of 722166120 is about 897.1788698599.

The spelling of 722166120 in words is "seven hundred twenty-two million, one hundred sixty-six thousand, one hundred twenty".