866441552270723 has 192 divisors, whose sum is σ = 1123100754048000. Its totient is φ = 658047355499520.

The previous prime is 866441552270713. The next prime is 866441552270743. The reversal of 866441552270723 is 327072255144668.

It is a happy number.

It is not a de Polignac number, because 866441552270723 - 2⁸ = 866441552270467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (866441552270713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 323661392861 + ... + 323661395537.

It is an arithmetic number, because the mean of its divisors is an integer number (5849483094000).

Almost surely, 2^{866441552270723} is an apocalyptic number.

866441552270723 is a deficient number, since it is larger than the sum of its proper divisors (256659201777277).

866441552270723 is a wasteful number, since it uses less digits than its factorization.

866441552270723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4970 (or 4951 counting only the distinct ones).

The product of its (nonzero) digits is 135475200, while the sum is 62.

The spelling of 866441552270723 in words is "eight hundred sixty-six trillion, four hundred forty-one billion, five hundred fifty-two million, two hundred seventy thousand, seven hundred twenty-three".