66489211 has 2 divisors, whose sum is σ = 66489212. Its totient is φ = 66489210.

The previous prime is 66489197. The next prime is 66489217. The reversal of 66489211 is 11298466.

It is a happy number.

66489211 is nontrivially palindromic in base 8.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66489211 - 2⁵ = 66489179 is a prime.

It is not a weakly prime, because it can be changed into another prime (66489217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33244605 + 33244606.

It is an arithmetic number, because the mean of its divisors is an integer number (33244606).

Almost surely, 2^66489211 is an apocalyptic number.

66489211 is a deficient number, since it is larger than the sum of its proper divisors (1).

66489211 is an equidigital number, since it uses as much as digits as its factorization.

66489211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 37.

The square root of 66489211 is about 8154.0916722833. The cubic root of 66489211 is about 405.1200396092.

The spelling of 66489211 in words is "sixty-six million, four hundred eighty-nine thousand, two hundred eleven".