722166456 has 128 divisors (see below), whose sum is σ = 2036482560. Its totient is φ = 211507200.

The previous prime is 722166437. The next prime is 722166457. The reversal of 722166456 is 654661227.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722166457) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1482645 + ... + 1483131.

It is an arithmetic number, because the mean of its divisors is an integer number (15910020).

Almost surely, 2^722166456 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 722166456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1018241280).

722166456 is an abundant number, since it is smaller than the sum of its proper divisors (1314316104).

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

722166456 is a wasteful number, since it uses less digits than its factorization.

722166456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685 (or 681 counting only the distinct ones).

The product of its digits is 120960, while the sum is 39.

The square root of 722166456 is about 26873.1549320135. The cubic root of 722166456 is about 897.1790090024.

The spelling of 722166456 in words is "seven hundred twenty-two million, one hundred sixty-six thousand, four hundred fifty-six".