66655327 has 2 divisors, whose sum is σ = 66655328. Its totient is φ = 66655326.

The previous prime is 66655321. The next prime is 66655331. The reversal of 66655327 is 72355666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66655327 - 2³ = 66655319 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66655327.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66655321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33327663 + 33327664.

It is an arithmetic number, because the mean of its divisors is an integer number (33327664).

Almost surely, 2^66655327 is an apocalyptic number.

66655327 is a deficient number, since it is larger than the sum of its proper divisors (1).

66655327 is an equidigital number, since it uses as much as digits as its factorization.

66655327 is an evil number, because the sum of its binary digits is even.

The product of its digits is 226800, while the sum is 40.

The square root of 66655327 is about 8164.2713698162. The cubic root of 66655327 is about 405.4571416869.

The spelling of 66655327 in words is "sixty-six million, six hundred fifty-five thousand, three hundred twenty-seven".