722216670 has 64 divisors (see below), whose sum is σ = 1992107520. Its totient is φ = 164147328.

The previous prime is 722216633. The next prime is 722216683. The reversal of 722216670 is 76612227.

722216670 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27984 + ... + 47196.

It is an arithmetic number, because the mean of its divisors is an integer number (31126680).

Almost surely, 2^722216670 is an apocalyptic number.

722216670 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 722216670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (996053760).

722216670 is an abundant number, since it is smaller than the sum of its proper divisors (1269890850).

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

722216670 is a wasteful number, since it uses less digits than its factorization.

722216670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19409.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 722216670 is about 26874.0891938685. The cubic root of 722216670 is about 897.1998028708.

Adding to 722216670 its reverse (76612227), we get a palindrome (798828897).

The spelling of 722216670 in words is "seven hundred twenty-two million, two hundred sixteen thousand, six hundred seventy".