6691456 has 32 divisors (see below), whose sum is σ = 13564980. Its totient is φ = 3287040.

The previous prime is 6691427. The next prime is 6691457. The reversal of 6691456 is 6541966.

It can be written as a sum of positive squares in 2 ways, for example, as 6677056 + 14400 = 2584^2 + 120^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6691457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7380 + ... + 8236.

Almost surely, 2^6691456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6691456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6782490).

6691456 is an abundant number, since it is smaller than the sum of its proper divisors (6873524).

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

6691456 is an equidigital number, since it uses as much as digits as its factorization.

6691456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932 (or 920 counting only the distinct ones).

The product of its digits is 38880, while the sum is 37.

The square root of 6691456 is about 2586.7848770240. The cubic root of 6691456 is about 188.4401937915.

The spelling of 6691456 in words is "six million, six hundred ninety-one thousand, four hundred fifty-six".