722123766 has 96 divisors (see below), whose sum is σ = 2027101440. Its totient is φ = 180418752.

The previous prime is 722123761. The next prime is 722123767. The reversal of 722123766 is 667321227.

It is a happy number.

722123766 is a `hidden beast` number, since 72 + 212 + 376 + 6 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 722123766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722123761) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19521 + ... + 42723.

It is an arithmetic number, because the mean of its divisors is an integer number (21115640).

Almost surely, 2^722123766 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 722123766, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1013550720).

722123766 is an abundant number, since it is smaller than the sum of its proper divisors (1304977674).

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

722123766 is a wasteful number, since it uses less digits than its factorization.

722123766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23250 (or 23247 counting only the distinct ones).

The product of its digits is 42336, while the sum is 36.

The square root of 722123766 is about 26872.3606331859. The cubic root of 722123766 is about 897.1613301020.

The spelling of 722123766 in words is "seven hundred twenty-two million, one hundred twenty-three thousand, seven hundred sixty-six".