66528959488427 has 2 divisors, whose sum is σ = 66528959488428. Its totient is φ = 66528959488426.

The previous prime is 66528959488351. The next prime is 66528959488513. The reversal of 66528959488427 is 72488495982566.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66528959488427 is a prime.

It is a super-2 number, since 2×66528959488427² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66528959488627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33264479744213 + 33264479744214.

It is an arithmetic number, because the mean of its divisors is an integer number (33264479744214).

Almost surely, 2^{66528959488427} is an apocalyptic number.

66528959488427 is a deficient number, since it is larger than the sum of its proper divisors (1).

66528959488427 is an equidigital number, since it uses as much as digits as its factorization.

66528959488427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16721510400, while the sum is 83.

The spelling of 66528959488427 in words is "sixty-six trillion, five hundred twenty-eight billion, nine hundred fifty-nine million, four hundred eighty-eight thousand, four hundred twenty-seven".