2216668671 has 24 divisors (see below), whose sum is σ = 3777306624. Its totient is φ = 1225806480.

The previous prime is 2216668667. The next prime is 2216668673. The reversal of 2216668671 is 1768666122.

It is not a de Polignac number, because 2216668671 - 2² = 2216668667 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2216668673) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 565551 + ... + 569456.

It is an arithmetic number, because the mean of its divisors is an integer number (157387776).

Almost surely, 2^2216668671 is an apocalyptic number.

2216668671 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2216668671 is a deficient number, since it is larger than the sum of its proper divisors (1560637953).

2216668671 is a wasteful number, since it uses less digits than its factorization.

2216668671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135051 (or 1135048 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 2216668671 is about 47081.5109252029. The cubic root of 2216668671 is about 1303.8679026660.

The spelling of 2216668671 in words is "two billion, two hundred sixteen million, six hundred sixty-eight thousand, six hundred seventy-one".