866761280451607 has 8 divisors (see below), whose sum is σ = 879918858116496. Its totient is φ = 853697351026752.

The previous prime is 866761280451581. The next prime is 866761280451631. The reversal of 866761280451607 is 706154082167668.

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-866761280451607 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 (866761280452607) 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, 23412041358 + ... + 23412078379.

It is an arithmetic number, because the mean of its divisors is an integer number (109989857264562).

Almost surely, 2^{866761280451607} is an apocalyptic number.

866761280451607 is a deficient number, since it is larger than the sum of its proper divisors (13157577664889).

866761280451607 is a wasteful number, since it uses less digits than its factorization.

866761280451607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46824120017.

The product of its (nonzero) digits is 162570240, while the sum is 67.

The spelling of 866761280451607 in words is "eight hundred sixty-six trillion, seven hundred sixty-one billion, two hundred eighty million, four hundred fifty-one thousand, six hundred seven".