722665561633 has 4 divisors (see below), whose sum is σ = 723001218948. Its totient is φ = 722329904320.

The previous prime is 722665561591. The next prime is 722665561661. The reversal of 722665561633 is 336165566227.

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

It can be written as a sum of positive squares in 2 ways, for example, as 452622163984 + 270043397649 = 672772^2 + 519657^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-722665561633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722665561333) 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, 167825428 + ... + 167829733.

It is an arithmetic number, because the mean of its divisors is an integer number (180750304737).

Almost surely, 2^722665561633 is an apocalyptic number.

It is an amenable number.

722665561633 is a deficient number, since it is larger than the sum of its proper divisors (335657315).

722665561633 is a wasteful number, since it uses less digits than its factorization.

722665561633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335657314.

The product of its digits is 8164800, while the sum is 52.

The spelling of 722665561633 in words is "seven hundred twenty-two billion, six hundred sixty-five million, five hundred sixty-one thousand, six hundred thirty-three".