722631660 has 48 divisors (see below), whose sum is σ = 2024549856. Its totient is φ = 192589312.

The previous prime is 722631659. The next prime is 722631661. The reversal of 722631660 is 66136227.

It is an interprime number because it is at equal distance from previous prime (722631659) and next prime (722631661).

It is not an unprimeable number, because it can be changed into a prime (722631661) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 175384 + ... + 179456.

It is an arithmetic number, because the mean of its divisors is an integer number (42178122).

Almost surely, 2^722631660 is an apocalyptic number.

It is an amenable number.

722631660 is an abundant number, since it is smaller than the sum of its proper divisors (1301918196).

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

722631660 is a wasteful number, since it uses less digits than its factorization.

722631660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7042 (or 7040 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 722631660 is about 26881.8090909076. The cubic root of 722631660 is about 897.3716154169.

Adding to 722631660 its reverse (66136227), we get a palindrome (788767887).

The spelling of 722631660 in words is "seven hundred twenty-two million, six hundred thirty-one thousand, six hundred sixty".