5671656221 has 8 divisors (see below), whose sum is σ = 7071155904. Its totient is φ = 4419472320.

The previous prime is 5671656217. The next prime is 5671656247. The reversal of 5671656221 is 1226561765.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5671656221 - 2² = 5671656217 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 (5671656281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36828860 + ... + 36829013.

It is an arithmetic number, because the mean of its divisors is an integer number (883894488).

Almost surely, 2^5671656221 is an apocalyptic number.

It is an amenable number.

5671656221 is a deficient number, since it is larger than the sum of its proper divisors (1399499683).

5671656221 is a wasteful number, since it uses less digits than its factorization.

5671656221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73657891.

The product of its digits is 151200, while the sum is 41.

The square root of 5671656221 is about 75310.3991557607. The cubic root of 5671656221 is about 1783.3501923543.

The spelling of 5671656221 in words is "five billion, six hundred seventy-one million, six hundred fifty-six thousand, two hundred twenty-one".