66075419 has 2 divisors, whose sum is σ = 66075420. Its totient is φ = 66075418.

The previous prime is 66075409. The next prime is 66075421. The reversal of 66075419 is 91457066.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66075419 - 2⁴ = 66075403 is a prime.

It is a super-3 number, since 3×66075419³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

Together with 66075421, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66075409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33037709 + 33037710.

It is an arithmetic number, because the mean of its divisors is an integer number (33037710).

Almost surely, 2^66075419 is an apocalyptic number.

66075419 is a deficient number, since it is larger than the sum of its proper divisors (1).

66075419 is an equidigital number, since it uses as much as digits as its factorization.

66075419 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 66075419 is about 8128.6787979351. The cubic root of 66075419 is about 404.2778759311.

The spelling of 66075419 in words is "sixty-six million, seventy-five thousand, four hundred nineteen".