8066021 has 4 divisors (see below), whose sum is σ = 8080044. Its totient is φ = 8052000.

The previous prime is 8065987. The next prime is 8066027. The reversal of 8066021 is 1206608.

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 7236100 + 829921 = 2690^2 + 911^2 .

It is a cyclic number.

It is not a de Polignac number, because 8066021 - 2⁶ = 8065957 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 (8066027) 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, 6110 + ... + 7311.

It is an arithmetic number, because the mean of its divisors is an integer number (2020011).

Almost surely, 2^8066021 is an apocalyptic number.

It is an amenable number.

8066021 is a deficient number, since it is larger than the sum of its proper divisors (14023).

8066021 is a wasteful number, since it uses less digits than its factorization.

8066021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14022.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 8066021 is about 2840.0741187511. The cubic root of 8066021 is about 200.5486684383.

The spelling of 8066021 in words is "eight million, sixty-six thousand, twenty-one".