66739763 has 2 divisors, whose sum is σ = 66739764. Its totient is φ = 66739762.

The previous prime is 66739703. The next prime is 66739769. The reversal of 66739763 is 36793766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66739763 - 2¹⁴ = 66723379 is a prime.

It is not a weakly prime, because it can be changed into another prime (66739769) 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, 33369881 + 33369882.

It is an arithmetic number, because the mean of its divisors is an integer number (33369882).

Almost surely, 2^66739763 is an apocalyptic number.

66739763 is a deficient number, since it is larger than the sum of its proper divisors (1).

66739763 is an equidigital number, since it uses as much as digits as its factorization.

66739763 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 857304, while the sum is 47.

The square root of 66739763 is about 8169.4408009361. The cubic root of 66739763 is about 405.6282744633.

The spelling of 66739763 in words is "sixty-six million, seven hundred thirty-nine thousand, seven hundred sixty-three".