866763317441044 has 24 divisors (see below), whose sum is σ = 1607483993489640. Its totient is φ = 407527336836096.

The previous prime is 866763317441003. The next prime is 866763317441059. The reversal of 866763317441044 is 440144713367668.

It can be written as a sum of positive squares in 4 ways, for example, as 226470294144900 + 640293023296144 = 15048930^2 + 25304012^2 .

It is a super-2 number, since 2×866763317441044² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5644971667 + ... + 5645125210.

It is an arithmetic number, because the mean of its divisors is an integer number (66978499728735).

Almost surely, 2^{866763317441044} is an apocalyptic number.

It is an amenable number.

866763317441044 is a deficient number, since it is larger than the sum of its proper divisors (740720676048596).

866763317441044 is a wasteful number, since it uses less digits than its factorization.

866763317441044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11290098027 (or 11290098025 counting only the distinct ones).

The product of its (nonzero) digits is 195084288, while the sum is 64.

The spelling of 866763317441044 in words is "eight hundred sixty-six trillion, seven hundred sixty-three billion, three hundred seventeen million, four hundred forty-one thousand, forty-four".