66537103 has 2 divisors, whose sum is σ = 66537104. Its totient is φ = 66537102.

The previous prime is 66537061. The next prime is 66537109. The reversal of 66537103 is 30173566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66537103 - 2¹³ = 66528911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66537109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33268551 + 33268552.

It is an arithmetic number, because the mean of its divisors is an integer number (33268552).

Almost surely, 2^66537103 is an apocalyptic number.

66537103 is a deficient number, since it is larger than the sum of its proper divisors (1).

66537103 is an equidigital number, since it uses as much as digits as its factorization.

66537103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 31.

The square root of 66537103 is about 8157.0278288112. The cubic root of 66537103 is about 405.2172852230.

The spelling of 66537103 in words is "sixty-six million, five hundred thirty-seven thousand, one hundred three".