866513767323412 has 24 divisors (see below), whose sum is σ = 1633046729239016. Its totient is φ = 399929050902528.

The previous prime is 866513767323389. The next prime is 866513767323419. The reversal of 866513767323412 is 214323767315668.

It can be written as a sum of positive squares in 4 ways, for example, as 22850273798416 + 843663493524996 = 4780196^2 + 29045886^2 .

It is a super-2 number, since 2×866513767323412² (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 (866513767323419) 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, 51563188 + ... + 66270580.

Almost surely, 2^{866513767323412} is an apocalyptic number.

It is an amenable number.

866513767323412 is a deficient number, since it is larger than the sum of its proper divisors (766532961915604).

866513767323412 is a wasteful number, since it uses less digits than its factorization.

866513767323412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15840427 (or 15840425 counting only the distinct ones).

The product of its digits is 182891520, while the sum is 64.

The spelling of 866513767323412 in words is "eight hundred sixty-six trillion, five hundred thirteen billion, seven hundred sixty-seven million, three hundred twenty-three thousand, four hundred twelve".