6780505065 has 16 divisors (see below), whose sum is σ = 10851152256. Its totient is φ = 3615488000.

The previous prime is 6780505049. The next prime is 6780505079. The reversal of 6780505065 is 5605050876.

It is not a de Polignac number, because 6780505065 - 2⁴ = 6780505049 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26665 + ... + 119465.

It is an arithmetic number, because the mean of its divisors is an integer number (678197016).

Almost surely, 2^6780505065 is an apocalyptic number.

It is an amenable number.

6780505065 is a deficient number, since it is larger than the sum of its proper divisors (4070647191).

6780505065 is a wasteful number, since it uses less digits than its factorization.

6780505065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97680.

The product of its (nonzero) digits is 252000, while the sum is 42.

The square root of 6780505065 is about 82343.8222637254. The cubic root of 6780505065 is about 1892.7242578519.

The spelling of 6780505065 in words is "six billion, seven hundred eighty million, five hundred five thousand, sixty-five".