66642671042676 has 36 divisors (see below), whose sum is σ = 172375487636352. Its totient is φ = 21697613827344.

The previous prime is 66642671042663. The next prime is 66642671042729. The reversal of 66642671042676 is 67624017624666.

It is a tau number, because it is divible by the number of its divisors (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, 21525408996 + ... + 21525412091.

Almost surely, 2^{66642671042676} is an apocalyptic number.

It is an amenable number.

66642671042676 is an abundant number, since it is smaller than the sum of its proper divisors (105732816593676).

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

66642671042676 is a wasteful number, since it uses less digits than its factorization.

66642671042676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43050821140 (or 43050821135 counting only the distinct ones).

The product of its (nonzero) digits is 146313216, while the sum is 63.

The spelling of 66642671042676 in words is "sixty-six trillion, six hundred forty-two billion, six hundred seventy-one million, forty-two thousand, six hundred seventy-six".