6505661506 has 16 divisors (see below), whose sum is σ = 9805787424. Its totient is φ = 3237090304.

The previous prime is 6505661453. The next prime is 6505661531. The reversal of 6505661506 is 6051665056.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 592341 + ... + 603223.

It is an arithmetic number, because the mean of its divisors is an integer number (612861714).

Almost surely, 2^6505661506 is an apocalyptic number.

6505661506 is a deficient number, since it is larger than the sum of its proper divisors (3300125918).

6505661506 is a wasteful number, since it uses less digits than its factorization.

6505661506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12305.

The product of its (nonzero) digits is 162000, while the sum is 40.

The square root of 6505661506 is about 80657.6810105522. The cubic root of 6505661506 is about 1866.7972579484.

The spelling of 6505661506 in words is "six billion, five hundred five million, six hundred sixty-one thousand, five hundred six".