866220098 has 16 divisors (see below), whose sum is σ = 1336736184. Its totient is φ = 420681600.

The previous prime is 866220097. The next prime is 866220101. The reversal of 866220098 is 890022668.

It can be written as a sum of positive squares in 4 ways, for example, as 851297329 + 14922769 = 29177^2 + 3863^2 .

It is not an unprimeable number, because it can be changed into a prime (866220097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34736 + ... + 54212.

Almost surely, 2^866220098 is an apocalyptic number.

866220098 is a deficient number, since it is larger than the sum of its proper divisors (470516086).

866220098 is a wasteful number, since it uses less digits than its factorization.

866220098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20117.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 866220098 is about 29431.6173187951. The cubic root of 866220098 is about 953.2557172154.

The spelling of 866220098 in words is "eight hundred sixty-six million, two hundred twenty thousand, ninety-eight".