66528335623 has 2 divisors, whose sum is σ = 66528335624. Its totient is φ = 66528335622.

The previous prime is 66528335597. The next prime is 66528335639. The reversal of 66528335623 is 32653382566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66528335623 - 2⁵ = 66528335591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66528333623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33264167811 + 33264167812.

It is an arithmetic number, because the mean of its divisors is an integer number (33264167812).

Almost surely, 2^66528335623 is an apocalyptic number.

66528335623 is a deficient number, since it is larger than the sum of its proper divisors (1).

66528335623 is an equidigital number, since it uses as much as digits as its factorization.

66528335623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4665600, while the sum is 49.

The spelling of 66528335623 in words is "sixty-six billion, five hundred twenty-eight million, three hundred thirty-five thousand, six hundred twenty-three".