6780155 has 8 divisors (see below), whose sum is σ = 8152272. Its totient is φ = 5413408.

The previous prime is 6780143. The next prime is 6780157. The reversal of 6780155 is 5510876.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6780155 - 2¹⁰ = 6779131 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6780157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2384 + ... + 4386.

It is an arithmetic number, because the mean of its divisors is an integer number (1019034).

Almost surely, 2^6780155 is an apocalyptic number.

6780155 is a deficient number, since it is larger than the sum of its proper divisors (1372117).

6780155 is a wasteful number, since it uses less digits than its factorization.

6780155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2685.

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 6780155 is about 2603.8730767839. The cubic root of 6780155 is about 189.2691684668.

The spelling of 6780155 in words is "six million, seven hundred eighty thousand, one hundred fifty-five".