722665697 has 8 divisors (see below), whose sum is σ = 796354944. Its totient is φ = 651562128.

The previous prime is 722665663. The next prime is 722665717. The reversal of 722665697 is 796566227.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 722665697 - 2¹⁰ = 722664673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722665607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 645833 + ... + 646950.

It is an arithmetic number, because the mean of its divisors is an integer number (99544368).

Almost surely, 2^722665697 is an apocalyptic number.

It is an amenable number.

722665697 is a deficient number, since it is larger than the sum of its proper divisors (73689247).

722665697 is a wasteful number, since it uses less digits than its factorization.

722665697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1292839.

The product of its digits is 1905120, while the sum is 50.

The square root of 722665697 is about 26882.4421695649. The cubic root of 722665697 is about 897.3857043642.

The spelling of 722665697 in words is "seven hundred twenty-two million, six hundred sixty-five thousand, six hundred ninety-seven".