866055106 has 60 divisors (see below), whose sum is σ = 1620384102. Its totient is φ = 345941568.

The previous prime is 866055097. The next prime is 866055107. The reversal of 866055106 is 601550668.

It can be written as a sum of positive squares in only one way, i.e., 636805225 + 229249881 = 25235^2 + 15141^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866055107) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 8408251 + ... + 8408353.

Almost surely, 2^866055106 is an apocalyptic number.

866055106 is a deficient number, since it is larger than the sum of its proper divisors (754328996).

866055106 is an equidigital number, since it uses as much as digits as its factorization.

866055106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253 (or 129 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 866055106 is about 29428.8142132842. The cubic root of 866055106 is about 953.1951900451.

The spelling of 866055106 in words is "eight hundred sixty-six million, fifty-five thousand, one hundred six".