66164503 has 2 divisors, whose sum is σ = 66164504. Its totient is φ = 66164502.

The previous prime is 66164489. The next prime is 66164513. The reversal of 66164503 is 30546166.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66164503 is a prime.

It is equal to p_3905266 and since 66164503 and 3905266 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66164513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33082251 + 33082252.

It is an arithmetic number, because the mean of its divisors is an integer number (33082252).

Almost surely, 2^66164503 is an apocalyptic number.

66164503 is a deficient number, since it is larger than the sum of its proper divisors (1).

66164503 is an equidigital number, since it uses as much as digits as its factorization.

66164503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 66164503 is about 8134.1565635289. The cubic root of 66164503 is about 404.4594791039.

The spelling of 66164503 in words is "sixty-six million, one hundred sixty-four thousand, five hundred three".