866866533433 has 4 divisors (see below), whose sum is σ = 868089194980. Its totient is φ = 865643871888.

The previous prime is 866866533427. The next prime is 866866533457. The reversal of 866866533433 is 334335668668.

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

It can be written as a sum of positive squares in 2 ways, for example, as 292381362729 + 574485170704 = 540723^2 + 757948^2 .

It is a cyclic number.

It is not a de Polignac number, because 866866533433 - 2³³ = 858276598841 is a prime.

It is a super-2 number, since 2×866866533433² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866866533413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 611329710 + ... + 611331127.

It is an arithmetic number, because the mean of its divisors is an integer number (217022298745).

Almost surely, 2^866866533433 is an apocalyptic number.

It is an amenable number.

866866533433 is a deficient number, since it is larger than the sum of its proper divisors (1222661547).

866866533433 is a wasteful number, since it uses less digits than its factorization.

866866533433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1222661546.

The product of its digits is 134369280, while the sum is 61.

The spelling of 866866533433 in words is "eight hundred sixty-six billion, eight hundred sixty-six million, five hundred thirty-three thousand, four hundred thirty-three".