866667766668 has 48 divisors (see below), whose sum is σ = 2228806360704. Its totient is φ = 259919101440.

The previous prime is 866667766633. The next prime is 866667766669.

866667766668 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×866667766668² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 866667766593 and 866667766602.

It is not an unprimeable number, because it can be changed into a prime (866667766669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33830830 + ... + 33856437.

It is an arithmetic number, because the mean of its divisors is an integer number (46433465848).

Almost surely, 2^866667766668 is an apocalyptic number.

It is an amenable number.

866667766668 is an abundant number, since it is smaller than the sum of its proper divisors (1362138594036).

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

866667766668 is a wasteful number, since it uses less digits than its factorization.

866667766668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67687382 (or 67687380 counting only the distinct ones).

The product of its digits is 5267275776, while the sum is 78.

The spelling of 866667766668 in words is "eight hundred sixty-six billion, six hundred sixty-seven million, seven hundred sixty-six thousand, six hundred sixty-eight".