6506616161 has 8 divisors (see below), whose sum is σ = 6528916800. Its totient is φ = 6484339440.

The previous prime is 6506616157. The next prime is 6506616163. The reversal of 6506616161 is 1616166056.

It is a happy number.

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 6506616161 - 2² = 6506616157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6506616163) 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, 663230 + ... + 672968.

It is an arithmetic number, because the mean of its divisors is an integer number (816114600).

Almost surely, 2^6506616161 is an apocalyptic number.

It is an amenable number.

6506616161 is a deficient number, since it is larger than the sum of its proper divisors (22300639).

6506616161 is a wasteful number, since it uses less digits than its factorization.

6506616161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11959.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 6506616161 is about 80663.5987357371. The cubic root of 6506616161 is about 1866.8885661200. Note that the first 3 decimals are identical.

The spelling of 6506616161 in words is "six billion, five hundred six million, six hundred sixteen thousand, one hundred sixty-one".