866800082823655 has 8 divisors (see below), whose sum is σ = 1040200729208784. Its totient is φ = 693412979712000.

The previous prime is 866800082823617. The next prime is 866800082823691. The reversal of 866800082823655 is 556328280008668.

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

It is a de Polignac number, because none of the positive numbers 2^k-866800082823655 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3385677561 + ... + 3385933570.

It is an arithmetic number, because the mean of its divisors is an integer number (130025091151098).

Almost surely, 2^{866800082823655} is an apocalyptic number.

866800082823655 is a deficient number, since it is larger than the sum of its proper divisors (173400646385129).

866800082823655 is a wasteful number, since it uses less digits than its factorization.

866800082823655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6771636737.

The product of its (nonzero) digits is 265420800, while the sum is 67.

The spelling of 866800082823655 in words is "eight hundred sixty-six trillion, eight hundred billion, eighty-two million, eight hundred twenty-three thousand, six hundred fifty-five".