866763317442381 has 8 divisors (see below), whose sum is σ = 1162604689264704. Its totient is φ = 574382078624160.

The previous prime is 866763317442247. The next prime is 866763317442403. The reversal of 866763317442381 is 183244713367668.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-866763317442381 is a prime.

It is a super-2 number, since 2×866763317442381² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866763319442381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 865033250440 + ... + 865033251441.

It is an arithmetic number, because the mean of its divisors is an integer number (145325586158088).

Almost surely, 2^{866763317442381} is an apocalyptic number.

It is an amenable number.

866763317442381 is a deficient number, since it is larger than the sum of its proper divisors (295841371822323).

866763317442381 is a wasteful number, since it uses less digits than its factorization.

866763317442381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1730066502051.

The product of its digits is 585252864, while the sum is 69.

The spelling of 866763317442381 in words is "eight hundred sixty-six trillion, seven hundred sixty-three billion, three hundred seventeen million, four hundred forty-two thousand, three hundred eighty-one".