66038575 has 6 divisors (see below), whose sum is σ = 81887864. Its totient is φ = 52830840.

The previous prime is 66038573. The next prime is 66038593. The reversal of 66038575 is 57583066.

It is not a de Polignac number, because 66038575 - 2¹ = 66038573 is a prime.

It is a super-2 number, since 2×66038575² = 8722186776061250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66038573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1320747 + ... + 1320796.

Almost surely, 2^66038575 is an apocalyptic number.

66038575 is a deficient number, since it is larger than the sum of its proper divisors (15849289).

66038575 is a wasteful number, since it uses less digits than its factorization.

66038575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2641553 (or 2641548 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 66038575 is about 8126.4121849682. The cubic root of 66038575 is about 404.2027194726.

The spelling of 66038575 in words is "sixty-six million, thirty-eight thousand, five hundred seventy-five".