66263419 has 2 divisors, whose sum is σ = 66263420. Its totient is φ = 66263418.

The previous prime is 66263371. The next prime is 66263441. The reversal of 66263419 is 91436266.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66263419 - 2⁷ = 66263291 is a prime.

It is a super-2 number, since 2×66263419² = 8781681395139122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66263479) 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, 33131709 + 33131710.

It is an arithmetic number, because the mean of its divisors is an integer number (33131710).

Almost surely, 2^66263419 is an apocalyptic number.

66263419 is a deficient number, since it is larger than the sum of its proper divisors (1).

66263419 is an equidigital number, since it uses as much as digits as its factorization.

66263419 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 37.

The square root of 66263419 is about 8140.2345789295. The cubic root of 66263419 is about 404.6609345243.

The spelling of 66263419 in words is "sixty-six million, two hundred sixty-three thousand, four hundred nineteen".