66116860 has 24 divisors (see below), whose sum is σ = 139771296. Its totient is φ = 26270400.

The previous prime is 66116857. The next prime is 66116867. The reversal of 66116860 is 6861166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66116867) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7927 + ... + 13966.

It is an arithmetic number, because the mean of its divisors is an integer number (5823804).

Almost surely, 2^66116860 is an apocalyptic number.

It is an amenable number.

66116860 is an abundant number, since it is smaller than the sum of its proper divisors (73654436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66116860 is a wasteful number, since it uses less digits than its factorization.

66116860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22053 (or 22051 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 66116860 is about 8131.2274596152. The cubic root of 66116860 is about 404.3623762310.

The spelling of 66116860 in words is "sixty-six million, one hundred sixteen thousand, eight hundred sixty".