3336641821 has 2 divisors, whose sum is σ = 3336641822. Its totient is φ = 3336641820.

The previous prime is 3336641801. The next prime is 3336641827. The reversal of 3336641821 is 1281466333.

3336641821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3330905796 + 5736025 = 57714^2 + 2395^2 .

It is a cyclic number.

It is not a de Polignac number, because 3336641821 - 2⁹ = 3336641309 is a prime.

It is a super-2 number, since 2×3336641821² = 22266357283292392082, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3336641827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1668320910 + 1668320911.

It is an arithmetic number, because the mean of its divisors is an integer number (1668320911).

Almost surely, 2^3336641821 is an apocalyptic number.

It is an amenable number.

3336641821 is a deficient number, since it is larger than the sum of its proper divisors (1).

3336641821 is an equidigital number, since it uses as much as digits as its factorization.

3336641821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 37.

The square root of 3336641821 is about 57763.6721564687. The cubic root of 3336641821 is about 1494.2956411741.

The spelling of 3336641821 in words is "three billion, three hundred thirty-six million, six hundred forty-one thousand, eight hundred twenty-one".