66303075 has 24 divisors (see below), whose sum is σ = 112588528. Its totient is φ = 34404480.

The previous prime is 66303073. The next prime is 66303101. The reversal of 66303075 is 57030366.

It is not a de Polignac number, because 66303075 - 2¹ = 66303073 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66303073) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9172 + ... + 14721.

Almost surely, 2^66303075 is an apocalyptic number.

66303075 is a deficient number, since it is larger than the sum of its proper divisors (46285453).

66303075 is a wasteful number, since it uses less digits than its factorization.

66303075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23943 (or 23938 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 30.

The square root of 66303075 is about 8142.6700166469. The cubic root of 66303075 is about 404.7416428754.

The spelling of 66303075 in words is "sixty-six million, three hundred three thousand, seventy-five".