6506110661 has 2 divisors, whose sum is σ = 6506110662. Its totient is φ = 6506110660.

The previous prime is 6506110621. The next prime is 6506110679. The reversal of 6506110661 is 1660116056.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4612990561 + 1893120100 = 67919^2 + 43510^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6506110661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6506110601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3253055330 + 3253055331.

It is an arithmetic number, because the mean of its divisors is an integer number (3253055331).

Almost surely, 2^6506110661 is an apocalyptic number.

It is an amenable number.

6506110661 is a deficient number, since it is larger than the sum of its proper divisors (1).

6506110661 is an equidigital number, since it uses as much as digits as its factorization.

6506110661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 6506110661 is about 80660.4652912441. The cubic root of 6506110661 is about 1866.8402185823.

The spelling of 6506110661 in words is "six billion, five hundred six million, one hundred ten thousand, six hundred sixty-one".