66883666 has 4 divisors (see below), whose sum is σ = 100325502. Its totient is φ = 33441832.

The previous prime is 66883637. The next prime is 66883681. The reversal of 66883666 is 66638866.

66883666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 46444225 + 20439441 = 6815^2 + 4521^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16720915 + ... + 16720918.

Almost surely, 2^66883666 is an apocalyptic number.

66883666 is a deficient number, since it is larger than the sum of its proper divisors (33441836).

66883666 is a wasteful number, since it uses less digits than its factorization.

66883666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33441835.

The product of its digits is 1492992, while the sum is 49.

The square root of 66883666 is about 8178.2434544345. The cubic root of 66883666 is about 405.9196011539.

The spelling of 66883666 in words is "sixty-six million, eight hundred eighty-three thousand, six hundred sixty-six".