866441300576381 has 4 divisors (see below), whose sum is σ = 868397150013792. Its totient is φ = 864485451138972.

The previous prime is 866441300576363. The next prime is 866441300576413. The reversal of 866441300576381 is 183675003144668.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 866441300576381 - 2¹⁸ = 866441300314237 is a prime.

It is a super-2 number, since 2×866441300576381² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866441300576321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 977924718041 + ... + 977924718926.

It is an arithmetic number, because the mean of its divisors is an integer number (217099287503448).

Almost surely, 2^{866441300576381} is an apocalyptic number.

It is an amenable number.

866441300576381 is a deficient number, since it is larger than the sum of its proper divisors (1955849437411).

866441300576381 is a wasteful number, since it uses less digits than its factorization.

866441300576381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1955849437410.

The product of its (nonzero) digits is 69672960, while the sum is 62.

The spelling of 866441300576381 in words is "eight hundred sixty-six trillion, four hundred forty-one billion, three hundred million, five hundred seventy-six thousand, three hundred eighty-one".