6780657 has 24 divisors (see below), whose sum is σ = 10085376. Its totient is φ = 4027968.

The previous prime is 6780629. The next prime is 6780679. The reversal of 6780657 is 7560876.

It is not a de Polignac number, because 6780657 - 2²⁰ = 5732081 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

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 23 ways as a sum of consecutive naturals, for example, 53328 + ... + 53454.

It is an arithmetic number, because the mean of its divisors is an integer number (420224).

Almost surely, 2^6780657 is an apocalyptic number.

It is an amenable number.

6780657 is a deficient number, since it is larger than the sum of its proper divisors (3304719).

6780657 is a wasteful number, since it uses less digits than its factorization.

6780657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 39.

The square root of 6780657 is about 2603.9694698671. The cubic root of 6780657 is about 189.2738394897.

The spelling of 6780657 in words is "six million, seven hundred eighty thousand, six hundred fifty-seven".