866800367577553 has 4 divisors (see below), whose sum is σ = 866800495867968. Its totient is φ = 866800239287140.

The previous prime is 866800367577523. The next prime is 866800367577589. The reversal of 866800367577553 is 355775763008668.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-866800367577553 is a prime.

It is a super-3 number, since 3×866800367577553³ (a number of 46 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 866800367577553.

It is not an unprimeable number, because it can be changed into a prime (866800367577523) 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, 53411701 + ... + 67723042.

It is an arithmetic number, because the mean of its divisors is an integer number (216700123966992).

Almost surely, 2^{866800367577553} is an apocalyptic number.

It is an amenable number.

866800367577553 is a deficient number, since it is larger than the sum of its proper divisors (128290415).

866800367577553 is a wasteful number, since it uses less digits than its factorization.

866800367577553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128290414.

The product of its (nonzero) digits is 5334336000, while the sum is 76.

The spelling of 866800367577553 in words is "eight hundred sixty-six trillion, eight hundred billion, three hundred sixty-seven million, five hundred seventy-seven thousand, five hundred fifty-three".