675821765663 has 4 divisors (see below), whose sum is σ = 737260108008. Its totient is φ = 614383423320.

The previous prime is 675821765639. The next prime is 675821765669. The reversal of 675821765663 is 366567128576.

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 675821765663 - 2¹² = 675821761567 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 675821765596 and 675821765605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (675821765669) 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, 30719171156 + ... + 30719171177.

It is an arithmetic number, because the mean of its divisors is an integer number (184315027002).

Almost surely, 2^675821765663 is an apocalyptic number.

675821765663 is a deficient number, since it is larger than the sum of its proper divisors (61438342345).

675821765663 is a wasteful number, since it uses less digits than its factorization.

675821765663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61438342344.

The product of its digits is 76204800, while the sum is 62.

The spelling of 675821765663 in words is "six hundred seventy-five billion, eight hundred twenty-one million, seven hundred sixty-five thousand, six hundred sixty-three".