66479219 has 2 divisors, whose sum is σ = 66479220. Its totient is φ = 66479218.

The previous prime is 66479201. The next prime is 66479239. The reversal of 66479219 is 91297466.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66479219 is a prime.

It is a super-2 number, since 2×66479219² = 8838973117699922, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66479219.

It is not a weakly prime, because it can be changed into another prime (66479239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33239609 + 33239610.

It is an arithmetic number, because the mean of its divisors is an integer number (33239610).

Almost surely, 2^66479219 is an apocalyptic number.

66479219 is a deficient number, since it is larger than the sum of its proper divisors (1).

66479219 is an equidigital number, since it uses as much as digits as its factorization.

66479219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 44.

The square root of 66479219 is about 8153.4789507302. The cubic root of 66479219 is about 405.0997447766.

The spelling of 66479219 in words is "sixty-six million, four hundred seventy-nine thousand, two hundred nineteen".