866788526364455 has 16 divisors (see below), whose sum is σ = 1073776212578304. Its totient is φ = 671014036993440.

The previous prime is 866788526364451. The next prime is 866788526364473. The reversal of 866788526364455 is 554463625887668.

It is not a de Polignac number, because 866788526364455 - 2² = 866788526364451 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 (866788526364451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198027857 + ... + 202357626.

It is an arithmetic number, because the mean of its divisors is an integer number (67111013286144).

Almost surely, 2^{866788526364455} is an apocalyptic number.

866788526364455 is a deficient number, since it is larger than the sum of its proper divisors (206987686213849).

866788526364455 is a wasteful number, since it uses less digits than its factorization.

866788526364455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400399486.

The product of its digits is 55738368000, while the sum is 83.

The spelling of 866788526364455 in words is "eight hundred sixty-six trillion, seven hundred eighty-eight billion, five hundred twenty-six million, three hundred sixty-four thousand, four hundred fifty-five".