722266879 has 4 divisors (see below), whose sum is σ = 764753184. Its totient is φ = 679780576.

The previous prime is 722266871. The next prime is 722266903. The reversal of 722266879 is 978662227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 978662227 = 27103 ⋅36109.

It is a cyclic number.

It is not a de Polignac number, because 722266879 - 2³ = 722266871 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722266871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21243127 + ... + 21243160.

It is an arithmetic number, because the mean of its divisors is an integer number (191188296).

Almost surely, 2^722266879 is an apocalyptic number.

722266879 is a deficient number, since it is larger than the sum of its proper divisors (42486305).

722266879 is a wasteful number, since it uses less digits than its factorization.

722266879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42486304.

The product of its digits is 1016064, while the sum is 49.

The square root of 722266879 is about 26875.0233302224. The cubic root of 722266879 is about 897.2205937049.

The spelling of 722266879 in words is "seven hundred twenty-two million, two hundred sixty-six thousand, eight hundred seventy-nine".