66091339 has 2 divisors, whose sum is σ = 66091340. Its totient is φ = 66091338.

The previous prime is 66091331. The next prime is 66091343. The reversal of 66091339 is 93319066.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66091339 - 2³ = 66091331 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66091298 and 66091307.

It is not a weakly prime, because it can be changed into another prime (66091331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33045669 + 33045670.

It is an arithmetic number, because the mean of its divisors is an integer number (33045670).

Almost surely, 2^66091339 is an apocalyptic number.

66091339 is a deficient number, since it is larger than the sum of its proper divisors (1).

66091339 is an equidigital number, since it uses as much as digits as its factorization.

66091339 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 37.

The square root of 66091339 is about 8129.6579878861. The cubic root of 66091339 is about 404.3103417964.

It can be divided in two parts, 66091 and 339, that added together give a triangular number (66430 = T₃₆₄).

The spelling of 66091339 in words is "sixty-six million, ninety-one thousand, three hundred thirty-nine".