66208683 has 4 divisors (see below), whose sum is σ = 88278248. Its totient is φ = 44139120.

The previous prime is 66208661. The next prime is 66208687. The reversal of 66208683 is 38680266.

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

It is not a de Polignac number, because 66208683 - 2²⁰ = 65160107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66208687) 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, 11034778 + ... + 11034783.

It is an arithmetic number, because the mean of its divisors is an integer number (22069562).

Almost surely, 2^66208683 is an apocalyptic number.

66208683 is a deficient number, since it is larger than the sum of its proper divisors (22069565).

66208683 is a wasteful number, since it uses less digits than its factorization.

66208683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22069564.

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 66208683 is about 8136.8718190715. The cubic root of 66208683 is about 404.5494822689.

The spelling of 66208683 in words is "sixty-six million, two hundred eight thousand, six hundred eighty-three".