66734963 has 2 divisors, whose sum is σ = 66734964. Its totient is φ = 66734962.

The previous prime is 66734929. The next prime is 66734977. The reversal of 66734963 is 36943766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66734963 - 2¹⁴ = 66718579 is a prime.

It is a super-2 number, since 2×66734963² = 8907110573222738, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66734363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33367481 + 33367482.

It is an arithmetic number, because the mean of its divisors is an integer number (33367482).

Almost surely, 2^66734963 is an apocalyptic number.

66734963 is a deficient number, since it is larger than the sum of its proper divisors (1).

66734963 is an equidigital number, since it uses as much as digits as its factorization.

66734963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 44.

The square root of 66734963 is about 8169.1470178961. The cubic root of 66734963 is about 405.6185498138.

The spelling of 66734963 in words is "sixty-six million, seven hundred thirty-four thousand, nine hundred sixty-three".