66884315 has 4 divisors (see below), whose sum is σ = 80261184. Its totient is φ = 53507448.

The previous prime is 66884269. The next prime is 66884327. The reversal of 66884315 is 51348866.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51348866 = 2 ⋅25674433.

It is a cyclic number.

It is not a de Polignac number, because 66884315 - 2¹⁰ = 66883291 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6688427 + ... + 6688436.

It is an arithmetic number, because the mean of its divisors is an integer number (20065296).

Almost surely, 2^66884315 is an apocalyptic number.

66884315 is a deficient number, since it is larger than the sum of its proper divisors (13376869).

66884315 is a wasteful number, since it uses less digits than its factorization.

66884315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13376868.

The product of its digits is 138240, while the sum is 41.

The square root of 66884315 is about 8178.2831327853. The cubic root of 66884315 is about 405.9209140851.

The spelling of 66884315 in words is "sixty-six million, eight hundred eighty-four thousand, three hundred fifteen".