66610278886 has 8 divisors (see below), whose sum is σ = 104259567024. Its totient is φ = 31857089880.

The previous prime is 66610278857. The next prime is 66610278887. The reversal of 66610278886 is 68887201666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 66610278886.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66610278887) 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, 724024725 + ... + 724024816.

It is an arithmetic number, because the mean of its divisors is an integer number (13032445878).

Almost surely, 2^66610278886 is an apocalyptic number.

66610278886 is a deficient number, since it is larger than the sum of its proper divisors (37649288138).

66610278886 is a wasteful number, since it uses less digits than its factorization.

66610278886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1448049566.

The product of its (nonzero) digits is 9289728, while the sum is 58.

The spelling of 66610278886 in words is "sixty-six billion, six hundred ten million, two hundred seventy-eight thousand, eight hundred eighty-six".