6000066021 has 4 divisors (see below), whose sum is σ = 8000088032. Its totient is φ = 4000044012.

The previous prime is 6000066011. The next prime is 6000066067. The reversal of 6000066021 is 1206600006.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6000066021 - 2⁵ = 6000065989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6000066011) 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, 1000011001 + ... + 1000011006.

It is an arithmetic number, because the mean of its divisors is an integer number (2000022008).

Almost surely, 2^6000066021 is an apocalyptic number.

It is an amenable number.

6000066021 is a deficient number, since it is larger than the sum of its proper divisors (2000022011).

6000066021 is a wasteful number, since it uses less digits than its factorization.

6000066021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2000022010.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 6000066021 is about 77460.0930866985. The cubic root of 6000066021 is about 1817.1272577032.

Adding to 6000066021 its reverse (1206600006), we get a palindrome (7206666027).

The spelling of 6000066021 in words is "six billion, sixty-six thousand, twenty-one".