866005524851 has 4 divisors (see below), whose sum is σ = 866590270104. Its totient is φ = 865420779600.

The previous prime is 866005524841. The next prime is 866005524859. The reversal of 866005524851 is 158425500668.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 866005524851 - 2²² = 866001330547 is a prime.

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 866005524851.

It is not an unprimeable number, because it can be changed into a prime (866005524859) 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, 292370405 + ... + 292373366.

It is an arithmetic number, because the mean of its divisors is an integer number (216647567526).

Almost surely, 2^866005524851 is an apocalyptic number.

866005524851 is a deficient number, since it is larger than the sum of its proper divisors (584745253).

866005524851 is a wasteful number, since it uses less digits than its factorization.

866005524851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584745252.

The product of its (nonzero) digits is 2304000, while the sum is 50.

The spelling of 866005524851 in words is "eight hundred sixty-six billion, five million, five hundred twenty-four thousand, eight hundred fifty-one".