66116570503 has 2 divisors, whose sum is σ = 66116570504. Its totient is φ = 66116570502.

The previous prime is 66116570497. The next prime is 66116570537. The reversal of 66116570503 is 30507561166.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66116570503 - 2⁹ = 66116569991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66116570563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33058285251 + 33058285252.

It is an arithmetic number, because the mean of its divisors is an integer number (33058285252).

Almost surely, 2^66116570503 is an apocalyptic number.

66116570503 is a deficient number, since it is larger than the sum of its proper divisors (1).

66116570503 is an equidigital number, since it uses as much as digits as its factorization.

66116570503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 113400, while the sum is 40.

The spelling of 66116570503 in words is "sixty-six billion, one hundred sixteen million, five hundred seventy thousand, five hundred three".