6780655 has 16 divisors (see below), whose sum is σ = 9368064. Its totient is φ = 4615200.

The previous prime is 6780629. The next prime is 6780679. The reversal of 6780655 is 5560876.

It is not a de Polignac number, because 6780655 - 2⁵ = 6780623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 4644 + ... + 5926.

It is an arithmetic number, because the mean of its divisors is an integer number (585504).

Almost surely, 2^6780655 is an apocalyptic number.

6780655 is a deficient number, since it is larger than the sum of its proper divisors (2587409).

6780655 is a wasteful number, since it uses less digits than its factorization.

6780655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1446.

The product of its (nonzero) digits is 50400, while the sum is 37.

The square root of 6780655 is about 2603.9690858380. The cubic root of 6780655 is about 189.2738208805.

The spelling of 6780655 in words is "six million, seven hundred eighty thousand, six hundred fifty-five".