6909680 has 20 divisors (see below), whose sum is σ = 16065192. Its totient is φ = 2763840.

The previous prime is 6909677. The next prime is 6909709. The reversal of 6909680 is 869096.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

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 3 ways as a sum of consecutive naturals, for example, 43106 + ... + 43265.

Almost surely, 2^6909680 is an apocalyptic number.

It is an amenable number.

6909680 is an abundant number, since it is smaller than the sum of its proper divisors (9155512).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6909680 is a wasteful number, since it uses less digits than its factorization.

6909680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86384 (or 86378 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 6909680 is about 2628.6270180457. The cubic root of 6909680 is about 190.4668115223.

The spelling of 6909680 in words is "six million, nine hundred nine thousand, six hundred eighty".