66879503 has 2 divisors, whose sum is σ = 66879504. Its totient is φ = 66879502.

The previous prime is 66879497. The next prime is 66879521. The reversal of 66879503 is 30597866.

66879503 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66879503 - 2²⁰ = 65830927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66879103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33439751 + 33439752.

It is an arithmetic number, because the mean of its divisors is an integer number (33439752).

Almost surely, 2^66879503 is an apocalyptic number.

66879503 is a deficient number, since it is larger than the sum of its proper divisors (1).

66879503 is an equidigital number, since it uses as much as digits as its factorization.

66879503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 66879503 is about 8177.9889337171. The cubic root of 66879503 is about 405.9111791755.

The spelling of 66879503 in words is "sixty-six million, eight hundred seventy-nine thousand, five hundred three".