866220863103 has 16 divisors (see below), whose sum is σ = 1298751498240. Its totient is φ = 570522976632.

The previous prime is 866220863099. The next prime is 866220863107. The reversal of 866220863103 is 301368022668.

It is a happy number.

866220863103 is a `hidden beast` number, since 8 + 6 + 6 + 2 + 2 + 0 + 8 + 631 + 0 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (866220863099) and next prime (866220863107).

It is not a de Polignac number, because 866220863103 - 2² = 866220863099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866220863107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193264351 + ... + 193268832.

It is an arithmetic number, because the mean of its divisors is an integer number (81171968640).

Almost surely, 2^866220863103 is an apocalyptic number.

866220863103 is a gapful number since it is divisible by the number (83) formed by its first and last digit.

866220863103 is a deficient number, since it is larger than the sum of its proper divisors (432530635137).

866220863103 is a wasteful number, since it uses less digits than its factorization.

866220863103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386533275 (or 386533269 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The spelling of 866220863103 in words is "eight hundred sixty-six billion, two hundred twenty million, eight hundred sixty-three thousand, one hundred three".