66135527 has 2 divisors, whose sum is σ = 66135528. Its totient is φ = 66135526.

The previous prime is 66135497. The next prime is 66135551. The reversal of 66135527 is 72553166.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66135527 - 2⁶ = 66135463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66135427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33067763 + 33067764.

It is an arithmetic number, because the mean of its divisors is an integer number (33067764).

Almost surely, 2^66135527 is an apocalyptic number.

66135527 is a deficient number, since it is larger than the sum of its proper divisors (1).

66135527 is an equidigital number, since it uses as much as digits as its factorization.

66135527 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37800, while the sum is 35.

The square root of 66135527 is about 8132.3752372846. The cubic root of 66135527 is about 404.4004276560.

The spelling of 66135527 in words is "sixty-six million, one hundred thirty-five thousand, five hundred twenty-seven".