66884039 has 4 divisors (see below), whose sum is σ = 68146056. Its totient is φ = 65622024.

The previous prime is 66884033. The next prime is 66884057. The reversal of 66884039 is 93048866.

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 66884039 - 2⁸ = 66883783 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 (66884033) 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, 630929 + ... + 631034.

It is an arithmetic number, because the mean of its divisors is an integer number (17036514).

Almost surely, 2^66884039 is an apocalyptic number.

66884039 is a deficient number, since it is larger than the sum of its proper divisors (1262017).

66884039 is a wasteful number, since it uses less digits than its factorization.

66884039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262016.

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 66884039 is about 8178.2662588106. The cubic root of 66884039 is about 405.9203557364.

The spelling of 66884039 in words is "sixty-six million, eight hundred eighty-four thousand, thirty-nine".