722321664 has 36 divisors (see below), whose sum is σ = 1922431056. Its totient is φ = 240773632.

The previous prime is 722321627. The next prime is 722321711. The reversal of 722321664 is 466123227.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 469494 + ... + 471029.

Almost surely, 2^722321664 is an apocalyptic number.

It is an amenable number.

722321664 is an abundant number, since it is smaller than the sum of its proper divisors (1200109392).

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

722321664 is an equidigital number, since it uses as much as digits as its factorization.

722321664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940542 (or 940528 counting only the distinct ones).

The product of its digits is 24192, while the sum is 33.

The square root of 722321664 is about 26876.0425658243. The cubic root of 722321664 is about 897.2432782965.

The spelling of 722321664 in words is "seven hundred twenty-two million, three hundred twenty-one thousand, six hundred sixty-four".