866761067521384 has 64 divisors (see below), whose sum is σ = 1880546386521600. Its totient is φ = 366852515871744.

The previous prime is 866761067521381. The next prime is 866761067521387. The reversal of 866761067521384 is 483125760167668.

It is an interprime number because it is at equal distance from previous prime (866761067521381) and next prime (866761067521387).

It is not an unprimeable number, because it can be changed into a prime (866761067521381) 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 15 ways as a sum of consecutive naturals, for example, 245489664 + ... + 248995375.

It is an arithmetic number, because the mean of its divisors is an integer number (29383537289400).

Almost surely, 2^{866761067521384} is an apocalyptic number.

It is an amenable number.

866761067521384 is an abundant number, since it is smaller than the sum of its proper divisors (1013785319000216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

866761067521384 is a wasteful number, since it uses less digits than its factorization.

866761067521384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494485442 (or 494485438 counting only the distinct ones).

The product of its (nonzero) digits is 487710720, while the sum is 70.

The spelling of 866761067521384 in words is "eight hundred sixty-six trillion, seven hundred sixty-one billion, sixty-seven million, five hundred twenty-one thousand, three hundred eighty-four".