6631616165 has 16 divisors (see below), whose sum is σ = 8010705600. Its totient is φ = 5270178432.

The previous prime is 6631616143. The next prime is 6631616171. The reversal of 6631616165 is 5616161366.

It is a cyclic number.

It is not a de Polignac number, because 6631616165 - 2¹² = 6631612069 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 1007174 + ... + 1013736.

It is an arithmetic number, because the mean of its divisors is an integer number (500669100).

Almost surely, 2^6631616165 is an apocalyptic number.

It is an amenable number.

6631616165 is a deficient number, since it is larger than the sum of its proper divisors (1379089435).

6631616165 is a wasteful number, since it uses less digits than its factorization.

6631616165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7876.

The product of its digits is 116640, while the sum is 41.

The square root of 6631616165 is about 81434.7356169344. The cubic root of 6631616165 is about 1878.7678818376.

The spelling of 6631616165 in words is "six billion, six hundred thirty-one million, six hundred sixteen thousand, one hundred sixty-five".