866421433 has 4 divisors (see below), whose sum is σ = 867863668. Its totient is φ = 864979200.

The previous prime is 866421419. The next prime is 866421463. The reversal of 866421433 is 334124668.

866421433 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 472279824 + 394141609 = 21732^2 + 19853^2 .

It is a cyclic number.

It is not a de Polignac number, because 866421433 - 2⁵ = 866421401 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 866421392 and 866421401.

It is not an unprimeable number, because it can be changed into a prime (866421403) 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, 720216 + ... + 721417.

It is an arithmetic number, because the mean of its divisors is an integer number (216965917).

Almost surely, 2^866421433 is an apocalyptic number.

It is an amenable number.

866421433 is a deficient number, since it is larger than the sum of its proper divisors (1442235).

866421433 is a wasteful number, since it uses less digits than its factorization.

866421433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1442234.

The product of its digits is 82944, while the sum is 37.

The square root of 866421433 is about 29435.0375063461. The cubic root of 866421433 is about 953.3295663725.

The spelling of 866421433 in words is "eight hundred sixty-six million, four hundred twenty-one thousand, four hundred thirty-three".