66528563 has 2 divisors, whose sum is σ = 66528564. Its totient is φ = 66528562.

The previous prime is 66528559. The next prime is 66528571. The reversal of 66528563 is 36582566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66528563 - 2² = 66528559 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66528563.

It is not a weakly prime, because it can be changed into another prime (66528503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33264281 + 33264282.

It is an arithmetic number, because the mean of its divisors is an integer number (33264282).

Almost surely, 2^66528563 is an apocalyptic number.

66528563 is a deficient number, since it is larger than the sum of its proper divisors (1).

66528563 is an equidigital number, since it uses as much as digits as its factorization.

66528563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 259200, while the sum is 41.

The square root of 66528563 is about 8156.5043370307. The cubic root of 66528563 is about 405.1999480105.

The spelling of 66528563 in words is "sixty-six million, five hundred twenty-eight thousand, five hundred sixty-three".