6642132331 has 2 divisors, whose sum is σ = 6642132332. Its totient is φ = 6642132330.

The previous prime is 6642132317. The next prime is 6642132377. The reversal of 6642132331 is 1332312466.

6642132331 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6642132331 - 2¹⁷ = 6642001259 is a prime.

It is a super-2 number, since 2×6642132331² = 88235843805030987122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6642132293 and 6642132302.

It is not a weakly prime, because it can be changed into another prime (6642132391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3321066165 + 3321066166.

It is an arithmetic number, because the mean of its divisors is an integer number (3321066166).

Almost surely, 2^6642132331 is an apocalyptic number.

6642132331 is a deficient number, since it is larger than the sum of its proper divisors (1).

6642132331 is an equidigital number, since it uses as much as digits as its factorization.

6642132331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 31.

The square root of 6642132331 is about 81499.2781010973. The cubic root of 6642132331 is about 1879.7604503704.

Adding to 6642132331 its reverse (1332312466), we get a palindrome (7974444797).

The spelling of 6642132331 in words is "six billion, six hundred forty-two million, one hundred thirty-two thousand, three hundred thirty-one".