866836147218835 has 16 divisors (see below), whose sum is σ = 1040274922598496. Its totient is φ = 693421222341888.

The previous prime is 866836147218773. The next prime is 866836147218841. The reversal of 866836147218835 is 538812741638668.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 866836147218835 - 2³⁹ = 866286391404947 is a prime.

It is a super-2 number, since 2×866836147218835² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5190956212 + ... + 5191123198.

It is an arithmetic number, because the mean of its divisors is an integer number (65017182662406).

Almost surely, 2^{866836147218835} is an apocalyptic number.

866836147218835 is a deficient number, since it is larger than the sum of its proper divisors (173438775379661).

866836147218835 is a wasteful number, since it uses less digits than its factorization.

866836147218835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232182.

The product of its digits is 2229534720, while the sum is 76.

The spelling of 866836147218835 in words is "eight hundred sixty-six trillion, eight hundred thirty-six billion, one hundred forty-seven million, two hundred eighteen thousand, eight hundred thirty-five".