66834503 has 2 divisors, whose sum is σ = 66834504. Its totient is φ = 66834502.

The previous prime is 66834499. The next prime is 66834539. The reversal of 66834503 is 30543866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66834503 - 2² = 66834499 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66834583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33417251 + 33417252.

It is an arithmetic number, because the mean of its divisors is an integer number (33417252).

Almost surely, 2^66834503 is an apocalyptic number.

66834503 is a deficient number, since it is larger than the sum of its proper divisors (1).

66834503 is an equidigital number, since it uses as much as digits as its factorization.

66834503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 66834503 is about 8175.2371831036. The cubic root of 66834503 is about 405.8201193812.

The spelling of 66834503 in words is "sixty-six million, eight hundred thirty-four thousand, five hundred three".