66252503 has 2 divisors, whose sum is σ = 66252504. Its totient is φ = 66252502.

The previous prime is 66252499. The next prime is 66252517. The reversal of 66252503 is 30525266.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66252503 - 2² = 66252499 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66251503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33126251 + 33126252.

It is an arithmetic number, because the mean of its divisors is an integer number (33126252).

Almost surely, 2^66252503 is an apocalyptic number.

66252503 is a deficient number, since it is larger than the sum of its proper divisors (1).

66252503 is an equidigital number, since it uses as much as digits as its factorization.

66252503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 66252503 is about 8139.5640546653. The cubic root of 66252503 is about 404.6387125029.

Adding to 66252503 its reverse (30525266), we get a palindrome (96777769).

The spelling of 66252503 in words is "sixty-six million, two hundred fifty-two thousand, five hundred three".