6541665460 has 24 divisors (see below), whose sum is σ = 14986361376. Its totient is φ = 2378787360.

The previous prime is 6541665413. The next prime is 6541665461. The reversal of 6541665460 is 645661456.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6541665461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14867202 + ... + 14867641.

It is an arithmetic number, because the mean of its divisors is an integer number (624431724).

Almost surely, 2^6541665460 is an apocalyptic number.

It is an amenable number.

6541665460 is an abundant number, since it is smaller than the sum of its proper divisors (8444695916).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6541665460 is a wasteful number, since it uses less digits than its factorization.

6541665460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29734863 (or 29734861 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 43.

The square root of 6541665460 is about 80880.5629307808. The cubic root of 6541665460 is about 1870.2346984443.

The spelling of 6541665460 in words is "six billion, five hundred forty-one million, six hundred sixty-five thousand, four hundred sixty".