66506527 has 2 divisors, whose sum is σ = 66506528. Its totient is φ = 66506526.

The previous prime is 66506521. The next prime is 66506537. The reversal of 66506527 is 72560566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66506527 - 2³ = 66506519 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66506521) 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, 33253263 + 33253264.

It is an arithmetic number, because the mean of its divisors is an integer number (33253264).

Almost surely, 2^66506527 is an apocalyptic number.

66506527 is a deficient number, since it is larger than the sum of its proper divisors (1).

66506527 is an equidigital number, since it uses as much as digits as its factorization.

66506527 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 37.

The square root of 66506527 is about 8155.1534013776. The cubic root of 66506527 is about 405.1552054635.

The spelling of 66506527 in words is "sixty-six million, five hundred six thousand, five hundred twenty-seven".