66681671468 has 12 divisors (see below), whose sum is σ = 116702522160. Its totient is φ = 33338093712.

The previous prime is 66681671453. The next prime is 66681671477. The reversal of 66681671468 is 86417618666.

66681671468 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 630296 + ... + 728447.

It is an arithmetic number, because the mean of its divisors is an integer number (9725210180).

Almost surely, 2^66681671468 is an apocalyptic number.

It is an amenable number.

66681671468 is a deficient number, since it is larger than the sum of its proper divisors (50020850692).

66681671468 is a wasteful number, since it uses less digits than its factorization.

66681671468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1371016 (or 1371014 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 59.

The spelling of 66681671468 in words is "sixty-six billion, six hundred eighty-one million, six hundred seventy-one thousand, four hundred sixty-eight".