5666458921 has 8 divisors (see below), whose sum is σ = 6003165960. Its totient is φ = 5330128128.

The previous prime is 5666458913. The next prime is 5666458933. The reversal of 5666458921 is 1298546665.

It can be written as a sum of positive squares in 4 ways, for example, as 1692417321 + 3974041600 = 41139^2 + 63040^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5666458921 - 2³ = 5666458913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5666458981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62746 + ... + 123571.

It is an arithmetic number, because the mean of its divisors is an integer number (750395745).

Almost surely, 2^5666458921 is an apocalyptic number.

It is an amenable number.

5666458921 is a deficient number, since it is larger than the sum of its proper divisors (336707039).

5666458921 is a wasteful number, since it uses less digits than its factorization.

5666458921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188123.

The product of its digits is 3110400, while the sum is 52.

The square root of 5666458921 is about 75275.8853883500. The cubic root of 5666458921 is about 1782.8052934057.

The spelling of 5666458921 in words is "five billion, six hundred sixty-six million, four hundred fifty-eight thousand, nine hundred twenty-one".