6537664 has 28 divisors (see below), whose sum is σ = 14827504. Its totient is φ = 2801664.

The previous prime is 6537649. The next prime is 6537667. The reversal of 6537664 is 4667356.

It is a tau number, because it is divible by the number of its divisors (28).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6537667) 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, 6849 + ... + 7744.

Almost surely, 2^6537664 is an apocalyptic number.

6537664 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

6537664 is an abundant number, since it is smaller than the sum of its proper divisors (8289840).

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

6537664 is a wasteful number, since it uses less digits than its factorization.

6537664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14612 (or 14602 counting only the distinct ones).

The product of its digits is 90720, while the sum is 37.

The square root of 6537664 is about 2556.8856055757. The cubic root of 6537664 is about 186.9853287126.

The spelling of 6537664 in words is "six million, five hundred thirty-seven thousand, six hundred sixty-four".