6628747662871 has 4 divisors (see below), whose sum is σ = 6630403611832. Its totient is φ = 6627091713912.

The previous prime is 6628747662857. The next prime is 6628747662881. The reversal of 6628747662871 is 1782667478266.

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

It is a cyclic number.

It is not a de Polignac number, because 6628747662871 - 2¹⁹ = 6628747138583 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6628747662871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6628747662881) 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, 827968476 + ... + 827976481.

It is an arithmetic number, because the mean of its divisors is an integer number (1657600902958).

Almost surely, 2^{6628747662871} is an apocalyptic number.

6628747662871 is a deficient number, since it is larger than the sum of its proper divisors (1655948961).

6628747662871 is a wasteful number, since it uses less digits than its factorization.

6628747662871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1655948960.

The product of its digits is 455196672, while the sum is 70.

The spelling of 6628747662871 in words is "six trillion, six hundred twenty-eight billion, seven hundred forty-seven million, six hundred sixty-two thousand, eight hundred seventy-one".