866522223 has 36 divisors (see below), whose sum is σ = 1458590328. Its totient is φ = 494272800.

The previous prime is 866522219. The next prime is 866522231. The reversal of 866522223 is 322225668.

It is not a de Polignac number, because 866522223 - 2² = 866522219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866522213) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 307740 + ... + 310542.

It is an arithmetic number, because the mean of its divisors is an integer number (40516398).

Almost surely, 2^866522223 is an apocalyptic number.

866522223 is a deficient number, since it is larger than the sum of its proper divisors (592068105).

866522223 is a wasteful number, since it uses less digits than its factorization.

866522223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3524 (or 3514 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 866522223 is about 29436.7495318352. The cubic root of 866522223 is about 953.3665315866.

The spelling of 866522223 in words is "eight hundred sixty-six million, five hundred twenty-two thousand, two hundred twenty-three".