66627293 has 2 divisors, whose sum is σ = 66627294. Its totient is φ = 66627292.

The previous prime is 66627229. The next prime is 66627299. The reversal of 66627293 is 39272666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53392249 + 13235044 = 7307^2 + 3638^2 .

It is a cyclic number.

It is not a de Polignac number, because 66627293 - 2⁶ = 66627229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66627293.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66627299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33313646 + 33313647.

It is an arithmetic number, because the mean of its divisors is an integer number (33313647).

Almost surely, 2^66627293 is an apocalyptic number.

It is an amenable number.

66627293 is a deficient number, since it is larger than the sum of its proper divisors (1).

66627293 is an equidigital number, since it uses as much as digits as its factorization.

66627293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 41.

The square root of 66627293 is about 8162.5543183491. The cubic root of 66627293 is about 405.4002911198.

The spelling of 66627293 in words is "sixty-six million, six hundred twenty-seven thousand, two hundred ninety-three".