6516720005 has 16 divisors (see below), whose sum is σ = 7860149760. Its totient is φ = 5186711232.

The previous prime is 6516719983. The next prime is 6516720037. The reversal of 6516720005 is 5000276156.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6516720005 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1020332 + ... + 1026698.

It is an arithmetic number, because the mean of its divisors is an integer number (491259360).

Almost surely, 2^6516720005 is an apocalyptic number.

It is an amenable number.

6516720005 is a deficient number, since it is larger than the sum of its proper divisors (1343429755).

6516720005 is a wasteful number, since it uses less digits than its factorization.

6516720005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7388.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 6516720005 is about 80726.2039550975. The cubic root of 6516720005 is about 1867.8544033062.

The spelling of 6516720005 in words is "six billion, five hundred sixteen million, seven hundred twenty thousand, five".