66661882 has 8 divisors (see below), whose sum is σ = 114277536. Its totient is φ = 28569372.

The previous prime is 66661867. The next prime is 66661883. The reversal of 66661882 is 28816666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (66661883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2380768 + ... + 2380795.

It is an arithmetic number, because the mean of its divisors is an integer number (14284692).

Almost surely, 2^66661882 is an apocalyptic number.

66661882 is a deficient number, since it is larger than the sum of its proper divisors (47615654).

66661882 is a wasteful number, since it uses less digits than its factorization.

66661882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4761572.

The product of its digits is 165888, while the sum is 43.

The square root of 66661882 is about 8164.6728042219. The cubic root of 66661882 is about 405.4704323698.

The spelling of 66661882 in words is "sixty-six million, six hundred sixty-one thousand, eight hundred eighty-two".