722256667 has 4 divisors (see below), whose sum is σ = 787916376. Its totient is φ = 656596960.

The previous prime is 722256643. The next prime is 722256673. The reversal of 722256667 is 766652227.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 722256667 - 2²³ = 713868059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722256607) 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, 32829838 + ... + 32829859.

It is an arithmetic number, because the mean of its divisors is an integer number (196979094).

Almost surely, 2^722256667 is an apocalyptic number.

722256667 is a deficient number, since it is larger than the sum of its proper divisors (65659709).

722256667 is a wasteful number, since it uses less digits than its factorization.

722256667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65659708.

The product of its digits is 423360, while the sum is 43.

The square root of 722256667 is about 26874.8333390181. The cubic root of 722256667 is about 897.2163651387.

The spelling of 722256667 in words is "seven hundred twenty-two million, two hundred fifty-six thousand, six hundred sixty-seven".