820566675701 has 8 divisors (see below), whose sum is σ = 860301518784. Its totient is φ = 781170001920.

The previous prime is 820566675679. The next prime is 820566675703. The reversal of 820566675701 is 107576665028.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-820566675701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820566675703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84537356 + ... + 84547061.

It is an arithmetic number, because the mean of its divisors is an integer number (107537689848).

Almost surely, 2^820566675701 is an apocalyptic number.

It is an amenable number.

820566675701 is a deficient number, since it is larger than the sum of its proper divisors (39734843083).

820566675701 is a wasteful number, since it uses less digits than its factorization.

820566675701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169084651.

The product of its (nonzero) digits is 4233600, while the sum is 53.

The spelling of 820566675701 in words is "eight hundred twenty billion, five hundred sixty-six million, six hundred seventy-five thousand, seven hundred one".