866761311323445 has 8 divisors (see below), whose sum is σ = 1386818098117536. Its totient is φ = 462272699372496.

The previous prime is 866761311323399. The next prime is 866761311323471. The reversal of 866761311323445 is 544323113167668.

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

It is not a de Polignac number, because 866761311323445 - 2³⁸ = 866486433416501 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28892043710767 + ... + 28892043710796.

It is an arithmetic number, because the mean of its divisors is an integer number (173352262264692).

Almost surely, 2^{866761311323445} is an apocalyptic number.

It is an amenable number.

866761311323445 is a deficient number, since it is larger than the sum of its proper divisors (520056786794091).

866761311323445 is a wasteful number, since it uses less digits than its factorization.

866761311323445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57784087421571.

The product of its digits is 52254720, while the sum is 60.

The spelling of 866761311323445 in words is "eight hundred sixty-six trillion, seven hundred sixty-one billion, three hundred eleven million, three hundred twenty-three thousand, four hundred forty-five".