6643416165 has 8 divisors (see below), whose sum is σ = 10629465888. Its totient is φ = 3543155280.

The previous prime is 6643416133. The next prime is 6643416167. The reversal of 6643416165 is 5616143466.

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

It is not a de Polignac number, because 6643416165 - 2⁵ = 6643416133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6643416167) 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, 221447191 + ... + 221447220.

It is an arithmetic number, because the mean of its divisors is an integer number (1328683236).

Almost surely, 2^6643416165 is an apocalyptic number.

It is an amenable number.

6643416165 is a deficient number, since it is larger than the sum of its proper divisors (3986049723).

6643416165 is a wasteful number, since it uses less digits than its factorization.

6643416165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442894419.

The product of its digits is 311040, while the sum is 42.

The square root of 6643416165 is about 81507.1540725107. The cubic root of 6643416165 is about 1879.8815532928.

The spelling of 6643416165 in words is "six billion, six hundred forty-three million, four hundred sixteen thousand, one hundred sixty-five".