6536512661 has 8 divisors (see below), whose sum is σ = 7482734784. Its totient is φ = 5593399200.

The previous prime is 6536512643. The next prime is 6536512667. The reversal of 6536512661 is 1662156356.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6536512661 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6536512667) 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, 772655 + ... + 781068.

It is an arithmetic number, because the mean of its divisors is an integer number (935341848).

Almost surely, 2^6536512661 is an apocalyptic number.

It is an amenable number.

6536512661 is a deficient number, since it is larger than the sum of its proper divisors (946222123).

6536512661 is a wasteful number, since it uses less digits than its factorization.

6536512661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1554331.

The product of its digits is 194400, while the sum is 41.

The square root of 6536512661 is about 80848.7022839575. The cubic root of 6536512661 is about 1869.7435149194.

The spelling of 6536512661 in words is "six billion, five hundred thirty-six million, five hundred twelve thousand, six hundred sixty-one".