866507670481686 has 32 divisors (see below), whose sum is σ = 1833833747225088. Its totient is φ = 272386571244480.

The previous prime is 866507670481631. The next prime is 866507670481693. The reversal of 866507670481686 is 686184076705668.

It is a super-2 number, since 2×866507670481686² (a number of 31 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 44218589431 + ... + 44218609026.

It is an arithmetic number, because the mean of its divisors is an integer number (57307304600784).

Almost surely, 2^{866507670481686} is an apocalyptic number.

866507670481686 is an abundant number, since it is smaller than the sum of its proper divisors (967326076743402).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

866507670481686 is a wasteful number, since it uses less digits than its factorization.

866507670481686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88437198556.

The product of its (nonzero) digits is 3901685760, while the sum is 78.

The spelling of 866507670481686 in words is "eight hundred sixty-six trillion, five hundred seven billion, six hundred seventy million, four hundred eighty-one thousand, six hundred eighty-six".