66965383 has 2 divisors, whose sum is σ = 66965384. Its totient is φ = 66965382.

The previous prime is 66965357. The next prime is 66965387. The reversal of 66965383 is 38356966.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66965383 - 2²¹ = 64868231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66965387) 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, 33482691 + 33482692.

It is an arithmetic number, because the mean of its divisors is an integer number (33482692).

Almost surely, 2^66965383 is an apocalyptic number.

66965383 is a deficient number, since it is larger than the sum of its proper divisors (1).

66965383 is an equidigital number, since it uses as much as digits as its factorization.

66965383 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 699840, while the sum is 46.

The square root of 66965383 is about 8183.2379288397. The cubic root of 66965383 is about 406.0848484366.

The spelling of 66965383 in words is "sixty-six million, nine hundred sixty-five thousand, three hundred eighty-three".