66003075 has 36 divisors (see below), whose sum is σ = 118820520. Its totient is φ = 35022720.

The previous prime is 66003053. The next prime is 66003083. The reversal of 66003075 is 57030066.

Added to its reverse (57030066) it gives a triangular number (123033141 = T₁₅₆₈₆).

66003075 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66003075 - 2⁷ = 66002947 is a prime.

It is an unprimeable number.

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 in 35 ways as a sum of consecutive naturals, for example, 51796 + ... + 53054.

It is an arithmetic number, because the mean of its divisors is an integer number (3300570).

Almost surely, 2^66003075 is an apocalyptic number.

66003075 is a deficient number, since it is larger than the sum of its proper divisors (52817445).

66003075 is a wasteful number, since it uses less digits than its factorization.

66003075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1508 (or 1500 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 66003075 is about 8124.2276555990. The cubic root of 66003075 is about 404.1302781330.

Adding to 66003075 its reverse (57030066), we get a triangular number (123033141 = T₁₅₆₈₆).

The spelling of 66003075 in words is "sixty-six million, three thousand, seventy-five".