866727668 has 12 divisors (see below), whose sum is σ = 1517027232. Its totient is φ = 433291320.

The previous prime is 866727637. The next prime is 866727679.

866727668 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15833 + ... + 44543.

It is an arithmetic number, because the mean of its divisors is an integer number (126418936).

Almost surely, 2^866727668 is an apocalyptic number.

It is an amenable number.

866727668 is a deficient number, since it is larger than the sum of its proper divisors (650299564).

866727668 is a wasteful number, since it uses less digits than its factorization.

866727668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36262 (or 36260 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 56.

The square root of 866727668 is about 29440.2389256609. The cubic root of 866727668 is about 953.4418706469.

The spelling of 866727668 in words is "eight hundred sixty-six million, seven hundred twenty-seven thousand, six hundred sixty-eight".