66717263 has 2 divisors, whose sum is σ = 66717264. Its totient is φ = 66717262.

The previous prime is 66717257. The next prime is 66717269. The reversal of 66717263 is 36271766.

It is a balanced prime because it is at equal distance from previous prime (66717257) and next prime (66717269).

It is a cyclic number.

It is not a de Polignac number, because 66717263 - 2⁴ = 66717247 is a prime.

It is a super-2 number, since 2×66717263² = 8902386364422338, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66717269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33358631 + 33358632.

It is an arithmetic number, because the mean of its divisors is an integer number (33358632).

Almost surely, 2^66717263 is an apocalyptic number.

66717263 is a deficient number, since it is larger than the sum of its proper divisors (1).

66717263 is an equidigital number, since it uses as much as digits as its factorization.

66717263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 38.

The square root of 66717263 is about 8168.0636016133. The cubic root of 66717263 is about 405.5826861384.

The spelling of 66717263 in words is "sixty-six million, seven hundred seventeen thousand, two hundred sixty-three".