66264503 has 2 divisors, whose sum is σ = 66264504. Its totient is φ = 66264502.

The previous prime is 66264491. The next prime is 66264529. The reversal of 66264503 is 30546266.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66264503 - 2⁶ = 66264439 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66264503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66264703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33132251 + 33132252.

It is an arithmetic number, because the mean of its divisors is an integer number (33132252).

Almost surely, 2^66264503 is an apocalyptic number.

66264503 is a deficient number, since it is larger than the sum of its proper divisors (1).

66264503 is an equidigital number, since it uses as much as digits as its factorization.

66264503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 66264503 is about 8140.3011615050. The cubic root of 66264503 is about 404.6631411216.

The spelling of 66264503 in words is "sixty-six million, two hundred sixty-four thousand, five hundred three".