66842959 has 2 divisors, whose sum is σ = 66842960. Its totient is φ = 66842958.

The previous prime is 66842863. The next prime is 66842981. The reversal of 66842959 is 95924866.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66842959 - 2²⁵ = 33288527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64842959) 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, 33421479 + 33421480.

It is an arithmetic number, because the mean of its divisors is an integer number (33421480).

Almost surely, 2^66842959 is an apocalyptic number.

66842959 is a deficient number, since it is larger than the sum of its proper divisors (1).

66842959 is an equidigital number, since it uses as much as digits as its factorization.

66842959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 49.

The square root of 66842959 is about 8175.7543382859. The cubic root of 66842959 is about 405.8372336463.

The spelling of 66842959 in words is "sixty-six million, eight hundred forty-two thousand, nine hundred fifty-nine".