66835427 has 2 divisors, whose sum is σ = 66835428. Its totient is φ = 66835426.

The previous prime is 66835409. The next prime is 66835429. The reversal of 66835427 is 72453866.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66835427 - 2¹⁰ = 66834403 is a prime.

Together with 66835429, 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 (66835429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33417713 + 33417714.

It is an arithmetic number, because the mean of its divisors is an integer number (33417714).

Almost surely, 2^66835427 is an apocalyptic number.

66835427 is a deficient number, since it is larger than the sum of its proper divisors (1).

66835427 is an equidigital number, since it uses as much as digits as its factorization.

66835427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 41.

The square root of 66835427 is about 8175.2936950302. The cubic root of 66835427 is about 405.8219895533.

The spelling of 66835427 in words is "sixty-six million, eight hundred thirty-five thousand, four hundred twenty-seven".