66479243 has 2 divisors, whose sum is σ = 66479244. Its totient is φ = 66479242.

The previous prime is 66479239. The next prime is 66479249. The reversal of 66479243 is 34297466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66479243 - 2² = 66479239 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66479243.

It is not a weakly prime, because it can be changed into another prime (66479249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33239621 + 33239622.

It is an arithmetic number, because the mean of its divisors is an integer number (33239622).

Almost surely, 2^66479243 is an apocalyptic number.

66479243 is a deficient number, since it is larger than the sum of its proper divisors (1).

66479243 is an equidigital number, since it uses as much as digits as its factorization.

66479243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 41.

The square root of 66479243 is about 8153.4804224944. The cubic root of 66479243 is about 405.0997935256.

The spelling of 66479243 in words is "sixty-six million, four hundred seventy-nine thousand, two hundred forty-three".