811607666447 has 8 divisors (see below), whose sum is σ = 823418780976. Its totient is φ = 799815287232.

The previous prime is 811607666431. The next prime is 811607666459. The reversal of 811607666447 is 744666706118.

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

It is a cyclic number.

It is not a de Polignac number, because 811607666447 - 2⁴ = 811607666431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 811607666392 and 811607666401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811607666347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4596548 + ... + 4769849.

It is an arithmetic number, because the mean of its divisors is an integer number (102927347622).

Almost surely, 2^811607666447 is an apocalyptic number.

811607666447 is a deficient number, since it is larger than the sum of its proper divisors (11811114529).

811607666447 is a wasteful number, since it uses less digits than its factorization.

811607666447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9367657.

The product of its (nonzero) digits is 8128512, while the sum is 56.

The spelling of 811607666447 in words is "eight hundred eleven billion, six hundred seven million, six hundred sixty-six thousand, four hundred forty-seven".