722721606 has 8 divisors (see below), whose sum is σ = 1445443224. Its totient is φ = 240907200.

The previous prime is 722721589. The next prime is 722721607. The reversal of 722721606 is 606127227.

It is a sphenic number, since it is the product of 3 distinct primes.

722721606 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722721607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60226795 + ... + 60226806.

It is an arithmetic number, because the mean of its divisors is an integer number (180680403).

Almost surely, 2^722721606 is an apocalyptic number.

722721606 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

722721606 is a wasteful number, since it uses less digits than its factorization.

722721606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120453606.

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

The square root of 722721606 is about 26883.4820289337. The cubic root of 722721606 is about 897.4088458360.

It can be divided in two parts, 722721 and 606, that added together give a palindrome (723327).

The spelling of 722721606 in words is "seven hundred twenty-two million, seven hundred twenty-one thousand, six hundred six".