866475507681683 has 4 divisors (see below), whose sum is σ = 896353973463840. Its totient is φ = 836597041899528.

The previous prime is 866475507681649. The next prime is 866475507681731. The reversal of 866475507681683 is 386186705574668.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 866475507681683 - 2²² = 866475503487379 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 866475507681598 and 866475507681607.

It is not an unprimeable number, because it can be changed into a prime (866475507681383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14939232891035 + ... + 14939232891092.

It is an arithmetic number, because the mean of its divisors is an integer number (224088493365960).

Almost surely, 2^{866475507681683} is an apocalyptic number.

866475507681683 is a deficient number, since it is larger than the sum of its proper divisors (29878465782157).

866475507681683 is a wasteful number, since it uses less digits than its factorization.

866475507681683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29878465782156.

The product of its (nonzero) digits is 9754214400, while the sum is 80.

The spelling of 866475507681683 in words is "eight hundred sixty-six trillion, four hundred seventy-five billion, five hundred seven million, six hundred eighty-one thousand, six hundred eighty-three".