66084419 has 2 divisors, whose sum is σ = 66084420. Its totient is φ = 66084418.

The previous prime is 66084409. The next prime is 66084427. The reversal of 66084419 is 91448066.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66084419 - 2¹² = 66080323 is a prime.

It is a super-2 number, since 2×66084419² = 8734300869135122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66084409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33042209 + 33042210.

It is an arithmetic number, because the mean of its divisors is an integer number (33042210).

Almost surely, 2^66084419 is an apocalyptic number.

66084419 is a deficient number, since it is larger than the sum of its proper divisors (1).

66084419 is an equidigital number, since it uses as much as digits as its factorization.

66084419 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 66084419 is about 8129.2323745849. The cubic root of 66084419 is about 404.2962303901.

The spelling of 66084419 in words is "sixty-six million, eighty-four thousand, four hundred nineteen".