66263471 has 2 divisors, whose sum is σ = 66263472. Its totient is φ = 66263470.

The previous prime is 66263443. The next prime is 66263479. The reversal of 66263471 is 17436266.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66263471 is a prime.

It is a super-3 number, since 3×66263471³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66263479) 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, 33131735 + 33131736.

It is an arithmetic number, because the mean of its divisors is an integer number (33131736).

Almost surely, 2^66263471 is an apocalyptic number.

66263471 is a deficient number, since it is larger than the sum of its proper divisors (1).

66263471 is an equidigital number, since it uses as much as digits as its factorization.

66263471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 35.

The square root of 66263471 is about 8140.2377729401. The cubic root of 66263471 is about 404.6610403763.

The spelling of 66263471 in words is "sixty-six million, two hundred sixty-three thousand, four hundred seventy-one".