722248998661 has 4 divisors (see below), whose sum is σ = 722264710752. Its totient is φ = 722233286572.

The previous prime is 722248998643. The next prime is 722248998673. The reversal of 722248998661 is 166899842227.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 722248998661 - 2¹³ = 722248990469 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 722248998593 and 722248998602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722248998461) 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 3 ways as a sum of consecutive naturals, for example, 7786891 + ... + 7879096.

It is an arithmetic number, because the mean of its divisors is an integer number (180566177688).

Almost surely, 2^722248998661 is an apocalyptic number.

It is an amenable number.

722248998661 is a deficient number, since it is larger than the sum of its proper divisors (15712091).

722248998661 is a wasteful number, since it uses less digits than its factorization.

722248998661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15712090.

The product of its digits is 41803776, while the sum is 64.

The spelling of 722248998661 in words is "seven hundred twenty-two billion, two hundred forty-eight million, nine hundred ninety-eight thousand, six hundred sixty-one".