6506516661 has 8 divisors (see below), whose sum is σ = 8779878240. Its totient is φ = 4285416432.

The previous prime is 6506516651. The next prime is 6506516671. The reversal of 6506516661 is 1666156056.

It is an interprime number because it is at equal distance from previous prime (6506516651) and next prime (6506516671).

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

It is a de Polignac number, because none of the positive numbers 2^k-6506516661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6506516651) 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, 13065046 + ... + 13065543.

It is an arithmetic number, because the mean of its divisors is an integer number (1097484780).

Almost surely, 2^6506516661 is an apocalyptic number.

It is an amenable number.

6506516661 is a deficient number, since it is larger than the sum of its proper divisors (2273361579).

6506516661 is a wasteful number, since it uses less digits than its factorization.

6506516661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26130675.

The product of its (nonzero) digits is 194400, while the sum is 42.

The square root of 6506516661 is about 80662.9819743853. The cubic root of 6506516661 is about 1866.8790498392.

The spelling of 6506516661 in words is "six billion, five hundred six million, five hundred sixteen thousand, six hundred sixty-one".