6687164 has 36 divisors (see below), whose sum is σ = 13505688. Its totient is φ = 2872800.

The previous prime is 6687143. The next prime is 6687167. The reversal of 6687164 is 4617866.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6687167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15674 + ... + 16094.

It is an arithmetic number, because the mean of its divisors is an integer number (375158).

Almost surely, 2^6687164 is an apocalyptic number.

It is an amenable number.

6687164 is an abundant number, since it is smaller than the sum of its proper divisors (6818524).

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

6687164 is a wasteful number, since it uses less digits than its factorization.

6687164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474 (or 453 counting only the distinct ones).

The product of its digits is 48384, while the sum is 38.

The square root of 6687164 is about 2585.9551426891. The cubic root of 6687164 is about 188.3998957211.

The spelling of 6687164 in words is "six million, six hundred eighty-seven thousand, one hundred sixty-four".