66839027 has 2 divisors, whose sum is σ = 66839028. Its totient is φ = 66839026.

The previous prime is 66839023. The next prime is 66839077. The reversal of 66839027 is 72093866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66839027 - 2² = 66839023 is a prime.

It is a super-3 number, since 3×66839027³ (a number of 24 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66839023) 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, 33419513 + 33419514.

It is an arithmetic number, because the mean of its divisors is an integer number (33419514).

Almost surely, 2^66839027 is an apocalyptic number.

66839027 is a deficient number, since it is larger than the sum of its proper divisors (1).

66839027 is an equidigital number, since it uses as much as digits as its factorization.

66839027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 66839027 is about 8175.5138676416. The cubic root of 66839027 is about 405.8292757735.

The spelling of 66839027 in words is "sixty-six million, eight hundred thirty-nine thousand, twenty-seven".