66123763 has 2 divisors, whose sum is σ = 66123764. Its totient is φ = 66123762.

The previous prime is 66123749. The next prime is 66123767. The reversal of 66123763 is 36732166.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66123763 is a prime.

It is not a weakly prime, because it can be changed into another prime (66123767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33061881 + 33061882.

It is an arithmetic number, because the mean of its divisors is an integer number (33061882).

Almost surely, 2^66123763 is an apocalyptic number.

66123763 is a deficient number, since it is larger than the sum of its proper divisors (1).

66123763 is an equidigital number, since it uses as much as digits as its factorization.

66123763 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 34.

The square root of 66123763 is about 8131.6519231949. The cubic root of 66123763 is about 404.3764483671.

The spelling of 66123763 in words is "sixty-six million, one hundred twenty-three thousand, seven hundred sixty-three".