66600060671 has 4 divisors (see below), whose sum is σ = 66610590000. Its totient is φ = 66589531344.

The previous prime is 66600060619. The next prime is 66600060691. The reversal of 66600060671 is 17606000666.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66600060671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66600060691) 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, 5255171 + ... + 5267828.

It is an arithmetic number, because the mean of its divisors is an integer number (16652647500).

Almost surely, 2^66600060671 is an apocalyptic number.

66600060671 is a deficient number, since it is larger than the sum of its proper divisors (10529329).

66600060671 is a wasteful number, since it uses less digits than its factorization.

66600060671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10529328.

The product of its (nonzero) digits is 54432, while the sum is 38.

The spelling of 66600060671 in words is "sixty-six billion, six hundred million, sixty thousand, six hundred seventy-one".