66275983 has 2 divisors, whose sum is σ = 66275984. Its totient is φ = 66275982.

The previous prime is 66275977. The next prime is 66275987. The reversal of 66275983 is 38957266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66275983 - 2⁹ = 66275471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66275987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33137991 + 33137992.

It is an arithmetic number, because the mean of its divisors is an integer number (33137992).

Almost surely, 2^66275983 is an apocalyptic number.

66275983 is a deficient number, since it is larger than the sum of its proper divisors (1).

66275983 is an equidigital number, since it uses as much as digits as its factorization.

66275983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 46.

The square root of 66275983 is about 8141.0062645842. The cubic root of 66275983 is about 404.6865084068.

The spelling of 66275983 in words is "sixty-six million, two hundred seventy-five thousand, nine hundred eighty-three".