866450324845204 has 18 divisors (see below), whose sum is σ = 1666663744692842. Its totient is φ = 393841056747600.

The previous prime is 866450324845199. The next prime is 866450324845241. The reversal of 866450324845204 is 402548423054668.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 562275447673104 + 304174877172100 = 23712348^2 + 17440610^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 895093310307 + ... + 895093311274.

Almost surely, 2^{866450324845204} is an apocalyptic number.

It is an amenable number.

866450324845204 is a deficient number, since it is larger than the sum of its proper divisors (800213419847638).

866450324845204 is a wasteful number, since it uses less digits than its factorization.

866450324845204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1790186621607 (or 1790186621594 counting only the distinct ones).

The product of its (nonzero) digits is 176947200, while the sum is 61.

The spelling of 866450324845204 in words is "eight hundred sixty-six trillion, four hundred fifty billion, three hundred twenty-four million, eight hundred forty-five thousand, two hundred four".