866682660413 has 4 divisors (see below), whose sum is σ = 867836699328. Its totient is φ = 865528621500.

The previous prime is 866682660407. The next prime is 866682660421. The reversal of 866682660413 is 314066286668.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 866682660413 - 2¹² = 866682656317 is a prime.

It is a super-2 number, since 2×866682660413² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866682660433) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 577018331 + ... + 577019832.

It is an arithmetic number, because the mean of its divisors is an integer number (216959174832).

Almost surely, 2^866682660413 is an apocalyptic number.

It is an amenable number.

866682660413 is a deficient number, since it is larger than the sum of its proper divisors (1154038915).

866682660413 is a wasteful number, since it uses less digits than its factorization.

866682660413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154038914.

The product of its (nonzero) digits is 11943936, while the sum is 56.

The spelling of 866682660413 in words is "eight hundred sixty-six billion, six hundred eighty-two million, six hundred sixty thousand, four hundred thirteen".