669993503 has 2 divisors, whose sum is σ = 669993504. Its totient is φ = 669993502.

The previous prime is 669993437. The next prime is 669993529. The reversal of 669993503 is 305399966.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 669993503 - 2¹⁶ = 669927967 is a prime.

It is a super-2 number, since 2×669993503² = 897782588124422018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (669993593) 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, 334996751 + 334996752.

It is an arithmetic number, because the mean of its divisors is an integer number (334996752).

Almost surely, 2^669993503 is an apocalyptic number.

669993503 is a deficient number, since it is larger than the sum of its proper divisors (1).

669993503 is an equidigital number, since it uses as much as digits as its factorization.

669993503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1180980, while the sum is 50.

The square root of 669993503 is about 25884.2327102814. The cubic root of 669993503 is about 875.0311838682.

The spelling of 669993503 in words is "six hundred sixty-nine million, nine hundred ninety-three thousand, five hundred three".