5866945921 has 4 divisors (see below), whose sum is σ = 5868256212. Its totient is φ = 5865635632.

The previous prime is 5866945907. The next prime is 5866945967. The reversal of 5866945921 is 1295496685.

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 3856410000 + 2010535921 = 62100^2 + 44839^2 .

It is a cyclic number.

It is not a de Polignac number, because 5866945921 - 2¹⁹ = 5866421633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5866945621) 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, 648406 + ... + 657391.

It is an arithmetic number, because the mean of its divisors is an integer number (1467064053).

Almost surely, 2^5866945921 is an apocalyptic number.

It is an amenable number.

5866945921 is a deficient number, since it is larger than the sum of its proper divisors (1310291).

5866945921 is a wasteful number, since it uses less digits than its factorization.

5866945921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1310290.

The product of its digits is 4665600, while the sum is 55.

The square root of 5866945921 is about 76595.9915465555. The cubic root of 5866945921 is about 1803.5881021224.

The spelling of 5866945921 in words is "five billion, eight hundred sixty-six million, nine hundred forty-five thousand, nine hundred twenty-one".