66005006 has 4 divisors (see below), whose sum is σ = 99007512. Its totient is φ = 33002502.

The previous prime is 66004987. The next prime is 66005021. The reversal of 66005006 is 60050066.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60050066 = 2 ⋅30025033.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16501250 + ... + 16501253.

It is an arithmetic number, because the mean of its divisors is an integer number (24751878).

Almost surely, 2^66005006 is an apocalyptic number.

66005006 is a deficient number, since it is larger than the sum of its proper divisors (33002506).

66005006 is a wasteful number, since it uses less digits than its factorization.

66005006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33002505.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 66005006 is about 8124.3464967959. The cubic root of 66005006 is about 404.1342192017.

The spelling of 66005006 in words is "sixty-six million, five thousand, six".