866628226091 has 8 divisors (see below), whose sum is σ = 871366783200. Its totient is φ = 861893505792.

The previous prime is 866628226027. The next prime is 866628226097. The reversal of 866628226091 is 190622826668.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 866628226091 - 2⁶ = 866628226027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866628226097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 505640 + ... + 1410293.

It is an arithmetic number, because the mean of its divisors is an integer number (108920847900).

Almost surely, 2^866628226091 is an apocalyptic number.

866628226091 is a deficient number, since it is larger than the sum of its proper divisors (4738557109).

866628226091 is a wasteful number, since it uses less digits than its factorization.

866628226091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1918405.

The product of its (nonzero) digits is 5971968, while the sum is 56.

The spelling of 866628226091 in words is "eight hundred sixty-six billion, six hundred twenty-eight million, two hundred twenty-six thousand, ninety-one".