866513767308884 has 12 divisors (see below), whose sum is σ = 1565315192558208. Its totient is φ = 419280855149400.

The previous prime is 866513767308821. The next prime is 866513767308887. The reversal of 866513767308884 is 488803767315668.

It is a super-2 number, since 2×866513767308884² (a number of 31 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 866513767308799 and 866513767308808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866513767308887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3494007126122 + ... + 3494007126369.

It is an arithmetic number, because the mean of its divisors is an integer number (130442932713184).

Almost surely, 2^{866513767308884} is an apocalyptic number.

It is an amenable number.

866513767308884 is a deficient number, since it is larger than the sum of its proper divisors (698801425249324).

866513767308884 is a wasteful number, since it uses less digits than its factorization.

866513767308884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6988014252526 (or 6988014252524 counting only the distinct ones).

The product of its (nonzero) digits is 7803371520, while the sum is 80.

The spelling of 866513767308884 in words is "eight hundred sixty-six trillion, five hundred thirteen billion, seven hundred sixty-seven million, three hundred eight thousand, eight hundred eighty-four".