66808116 has 36 divisors (see below), whose sum is σ = 169260000. Its totient is φ = 22218768.

The previous prime is 66808109. The next prime is 66808153. The reversal of 66808116 is 61180866.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16105 + ... + 19823.

Almost surely, 2^66808116 is an apocalyptic number.

It is an amenable number.

66808116 is an abundant number, since it is smaller than the sum of its proper divisors (102451884).

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

66808116 is a wasteful number, since it uses less digits than its factorization.

66808116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4228 (or 4223 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 66808116 is about 8173.6231868126. The cubic root of 66808116 is about 405.7667049292.

The spelling of 66808116 in words is "sixty-six million, eight hundred eight thousand, one hundred sixteen".