66074039 has 4 divisors (see below), whose sum is σ = 69551640. Its totient is φ = 62596440.

The previous prime is 66074027. The next prime is 66074069. The reversal of 66074039 is 93047066.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66074039 - 2⁴ = 66074023 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 (66074069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1738772 + ... + 1738809.

It is an arithmetic number, because the mean of its divisors is an integer number (17387910).

Almost surely, 2^66074039 is an apocalyptic number.

66074039 is a deficient number, since it is larger than the sum of its proper divisors (3477601).

66074039 is a wasteful number, since it uses less digits than its factorization.

66074039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3477600.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 66074039 is about 8128.5939128486. The cubic root of 66074039 is about 404.2750614334.

The spelling of 66074039 in words is "sixty-six million, seventy-four thousand, thirty-nine".