722172660 has 96 divisors (see below), whose sum is σ = 2265604992. Its totient is φ = 170334720.

The previous prime is 722172643. The next prime is 722172707. The reversal of 722172660 is 66271227.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9634 + ... + 39206.

It is an arithmetic number, because the mean of its divisors is an integer number (23600052).

Almost surely, 2^722172660 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 722172660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1132802496).

722172660 is an abundant number, since it is smaller than the sum of its proper divisors (1543432332).

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

722172660 is a wasteful number, since it uses less digits than its factorization.

722172660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29633 (or 29631 counting only the distinct ones).

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

The square root of 722172660 is about 26873.2703629462. The cubic root of 722172660 is about 897.1815781620.

The spelling of 722172660 in words is "seven hundred twenty-two million, one hundred seventy-two thousand, six hundred sixty".