6565154661 has 72 divisors (see below), whose sum is σ = 10878843456. Its totient is φ = 3805401600.

The previous prime is 6565154653. The next prime is 6565154689. The reversal of 6565154661 is 1664515656.

6565154661 is a `hidden beast` number, since 6 + 56 + 51 + 546 + 6 + 1 = 666.

It is not a de Polignac number, because 6565154661 - 2³ = 6565154653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6565154621) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2342461 + ... + 2345261.

It is an arithmetic number, because the mean of its divisors is an integer number (151095048).

Almost surely, 2^6565154661 is an apocalyptic number.

It is an amenable number.

6565154661 is a deficient number, since it is larger than the sum of its proper divisors (4313688795).

6565154661 is a wasteful number, since it uses less digits than its factorization.

6565154661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2923 (or 2907 counting only the distinct ones).

The product of its digits is 648000, while the sum is 45.

The square root of 6565154661 is about 81025.6419968395. The cubic root of 6565154661 is about 1872.4705125175.

The spelling of 6565154661 in words is "six billion, five hundred sixty-five million, one hundred fifty-four thousand, six hundred sixty-one".