6605672161 has 16 divisors (see below), whose sum is σ = 7318821888. Its totient is φ = 5911948800.

The previous prime is 6605672153. The next prime is 6605672179. The reversal of 6605672161 is 1612765066.

It is a cyclic number.

It is not a de Polignac number, because 6605672161 - 2³ = 6605672153 is a prime.

It is a super-2 number, since 2×6605672161² = 87269809397220819842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6605672111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187591 + ... + 220003.

It is an arithmetic number, because the mean of its divisors is an integer number (457426368).

Almost surely, 2^6605672161 is an apocalyptic number.

It is an amenable number.

6605672161 is a deficient number, since it is larger than the sum of its proper divisors (713149727).

6605672161 is a wasteful number, since it uses less digits than its factorization.

6605672161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32712.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 6605672161 is about 81275.2862867920. The cubic root of 6605672161 is about 1876.3146606797.

The spelling of 6605672161 in words is "six billion, six hundred five million, six hundred seventy-two thousand, one hundred sixty-one".