6642472211 has 2 divisors, whose sum is σ = 6642472212. Its totient is φ = 6642472210.

The previous prime is 6642472159. The next prime is 6642472223. The reversal of 6642472211 is 1122742466.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6642472211 is a prime.

It is not a weakly prime, because it can be changed into another prime (6642412211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3321236105 + 3321236106.

It is an arithmetic number, because the mean of its divisors is an integer number (3321236106).

Almost surely, 2^6642472211 is an apocalyptic number.

6642472211 is a deficient number, since it is larger than the sum of its proper divisors (1).

6642472211 is an equidigital number, since it uses as much as digits as its factorization.

6642472211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 35.

The square root of 6642472211 is about 81501.3632462672. The cubic root of 6642472211 is about 1879.7925124680.

The spelling of 6642472211 in words is "six billion, six hundred forty-two million, four hundred seventy-two thousand, two hundred eleven".