66117882 has 24 divisors (see below), whose sum is σ = 133570944. Its totient is φ = 21818944.

The previous prime is 66117869. The next prime is 66117889. The reversal of 66117882 is 28871166.

It is a self number, because there is not a number n which added to its sum of digits gives 66117882.

It is not an unprimeable number, because it can be changed into a prime (66117889) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76183 + ... + 77045.

It is an arithmetic number, because the mean of its divisors is an integer number (5565456).

Almost surely, 2^66117882 is an apocalyptic number.

66117882 is an abundant number, since it is smaller than the sum of its proper divisors (67453062).

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

66117882 is a wasteful number, since it uses less digits than its factorization.

66117882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094 (or 981 counting only the distinct ones).

The product of its digits is 32256, while the sum is 39.

The square root of 66117882 is about 8131.2903035127. The cubic root of 66117882 is about 404.3644596947.

The spelling of 66117882 in words is "sixty-six million, one hundred seventeen thousand, eight hundred eighty-two".