66116668 has 6 divisors (see below), whose sum is σ = 115704176. Its totient is φ = 33058332.

The previous prime is 66116653. The next prime is 66116681. The reversal of 66116668 is 86661166.

It is a self number, because there is not a number n which added to its sum of digits gives 66116668.

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, 8264580 + ... + 8264587.

Almost surely, 2^66116668 is an apocalyptic number.

It is an amenable number.

66116668 is a deficient number, since it is larger than the sum of its proper divisors (49587508).

66116668 is a wasteful number, since it uses less digits than its factorization.

66116668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16529171 (or 16529169 counting only the distinct ones).

The product of its digits is 62208, while the sum is 40.

The square root of 66116668 is about 8131.2156532710. The cubic root of 66116668 is about 404.3619848147.

The spelling of 66116668 in words is "sixty-six million, one hundred sixteen thousand, six hundred sixty-eight".