806756643773 has 4 divisors (see below), whose sum is σ = 811419977148. Its totient is φ = 802093310400.

The previous prime is 806756643761. The next prime is 806756643817. The reversal of 806756643773 is 377346657608.

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 693377632249 + 113379011524 = 832693^2 + 336718^2 .

It is a cyclic number.

It is not a de Polignac number, because 806756643773 - 2⁴ = 806756643757 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 (806756643713) 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, 2331666428 + ... + 2331666773.

It is an arithmetic number, because the mean of its divisors is an integer number (202854994287).

Almost surely, 2^806756643773 is an apocalyptic number.

It is an amenable number.

806756643773 is a deficient number, since it is larger than the sum of its proper divisors (4663333375).

806756643773 is a wasteful number, since it uses less digits than its factorization.

806756643773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4663333374.

The product of its (nonzero) digits is 106686720, while the sum is 62.

The spelling of 806756643773 in words is "eight hundred six billion, seven hundred fifty-six million, six hundred forty-three thousand, seven hundred seventy-three".