722766 has 32 divisors (see below), whose sum is σ = 1617408. Its totient is φ = 213440.

The previous prime is 722749. The next prime is 722783. The reversal of 722766 is 667227.

722766 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (722749) and next prime (722783).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2986 + ... + 3218.

It is an arithmetic number, because the mean of its divisors is an integer number (50544).

2⁷²²⁷⁶⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 722766, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (808704).

722766 is an abundant number, since it is smaller than the sum of its proper divisors (894642).

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

722766 is a wasteful number, since it uses less digits than its factorization.

722766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296.

The product of its digits is 7056, while the sum is 30.

The square root of 722766 is about 850.1564561891. The cubic root of 722766 is about 89.7427220248.

The spelling of 722766 in words is "seven hundred twenty-two thousand, seven hundred sixty-six".