66603065 has 8 divisors (see below), whose sum is σ = 81873288. Its totient is φ = 51982720.

The previous prime is 66603049. The next prime is 66603079. The reversal of 66603065 is 56030666.

66603065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 327184 + 66275881 = 572^2 + 8141^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66603065 - 2⁴ = 66603049 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 162242 + ... + 162651.

It is an arithmetic number, because the mean of its divisors is an integer number (10234161).

Almost surely, 2^66603065 is an apocalyptic number.

It is an amenable number.

66603065 is a deficient number, since it is larger than the sum of its proper divisors (15270223).

66603065 is a wasteful number, since it uses less digits than its factorization.

66603065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324939.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 66603065 is about 8161.0700891488. The cubic root of 66603065 is about 405.3511459492.

The spelling of 66603065 in words is "sixty-six million, six hundred three thousand, sixty-five".