66675223 has 2 divisors, whose sum is σ = 66675224. Its totient is φ = 66675222.

The previous prime is 66675209. The next prime is 66675239. The reversal of 66675223 is 32257666.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66675223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66675253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33337611 + 33337612.

It is an arithmetic number, because the mean of its divisors is an integer number (33337612).

Almost surely, 2^66675223 is an apocalyptic number.

66675223 is a deficient number, since it is larger than the sum of its proper divisors (1).

66675223 is an equidigital number, since it uses as much as digits as its factorization.

66675223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 37.

The square root of 66675223 is about 8165.4897587346. The cubic root of 66675223 is about 405.4974794120.

The spelling of 66675223 in words is "sixty-six million, six hundred seventy-five thousand, two hundred twenty-three".