866761067521383 has 16 divisors (see below), whose sum is σ = 1220012544635520. Its totient is φ = 545850440204256.

The previous prime is 866761067521381. The next prime is 866761067521387. The reversal of 866761067521383 is 383125760167668.

It is not a de Polignac number, because 866761067521383 - 2¹ = 866761067521381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866761067521381) 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, 21911125060 + ... + 21911164617.

It is an arithmetic number, because the mean of its divisors is an integer number (76250784039720).

Almost surely, 2^{866761067521383} is an apocalyptic number.

866761067521383 is a deficient number, since it is larger than the sum of its proper divisors (353251477114137).

866761067521383 is a wasteful number, since it uses less digits than its factorization.

866761067521383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43822290046.

The product of its (nonzero) digits is 365783040, while the sum is 69.

The spelling of 866761067521383 in words is "eight hundred sixty-six trillion, seven hundred sixty-one billion, sixty-seven million, five hundred twenty-one thousand, three hundred eighty-three".