66305983 has 2 divisors, whose sum is σ = 66305984. Its totient is φ = 66305982.

The previous prime is 66305959. The next prime is 66306007. The reversal of 66305983 is 38950366.

It is a balanced prime because it is at equal distance from previous prime (66305959) and next prime (66306007).

It is a cyclic number.

It is not a de Polignac number, because 66305983 - 2⁵ = 66305951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66305923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33152991 + 33152992.

It is an arithmetic number, because the mean of its divisors is an integer number (33152992).

Almost surely, 2^66305983 is an apocalyptic number.

66305983 is a deficient number, since it is larger than the sum of its proper divisors (1).

66305983 is an equidigital number, since it uses as much as digits as its factorization.

66305983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 66305983 is about 8142.8485801960. The cubic root of 66305983 is about 404.7475600042.

The spelling of 66305983 in words is "sixty-six million, three hundred five thousand, nine hundred eighty-three".