66240983 has 2 divisors, whose sum is σ = 66240984. Its totient is φ = 66240982.

The previous prime is 66240971. The next prime is 66241013. The reversal of 66240983 is 38904266.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66240983 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66240913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33120491 + 33120492.

It is an arithmetic number, because the mean of its divisors is an integer number (33120492).

Almost surely, 2^66240983 is an apocalyptic number.

66240983 is a deficient number, since it is larger than the sum of its proper divisors (1).

66240983 is an equidigital number, since it uses as much as digits as its factorization.

66240983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 66240983 is about 8138.8563692942. The cubic root of 66240983 is about 404.6152582535.

The spelling of 66240983 in words is "sixty-six million, two hundred forty thousand, nine hundred eighty-three".