66244379 has 2 divisors, whose sum is σ = 66244380. Its totient is φ = 66244378.

The previous prime is 66244369. The next prime is 66244403. The reversal of 66244379 is 97344266.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66244379 - 2¹² = 66240283 is a prime.

It is not a weakly prime, because it can be changed into another prime (66244369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33122189 + 33122190.

It is an arithmetic number, because the mean of its divisors is an integer number (33122190).

Almost surely, 2^66244379 is an apocalyptic number.

66244379 is a deficient number, since it is larger than the sum of its proper divisors (1).

66244379 is an equidigital number, since it uses as much as digits as its factorization.

66244379 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 66244379 is about 8139.0649954402. The cubic root of 66244379 is about 404.6221726534.

The spelling of 66244379 in words is "sixty-six million, two hundred forty-four thousand, three hundred seventy-nine".