866475040364560 has 80 divisors (see below), whose sum is σ = 2197738268462592. Its totient is φ = 315075741926400.

The previous prime is 866475040364471. The next prime is 866475040364561. The reversal of 866475040364560 is 65463040574668.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 866475040364492 and 866475040364501.

It is not an unprimeable number, because it can be changed into a prime (866475040364561) 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, 36155332 + ... + 55137628.

Almost surely, 2^{866475040364560} is an apocalyptic number.

866475040364560 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

866475040364560 is an abundant number, since it is smaller than the sum of its proper divisors (1331263228098032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

866475040364560 is a wasteful number, since it uses less digits than its factorization.

866475040364560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19034192 (or 19034186 counting only the distinct ones).

The product of its (nonzero) digits is 348364800, while the sum is 64.

The spelling of 866475040364560 in words is "eight hundred sixty-six trillion, four hundred seventy-five billion, forty million, three hundred sixty-four thousand, five hundred sixty".