6497664 has 32 divisors (see below), whose sum is σ = 17260440. Its totient is φ = 2165760.

The previous prime is 6497591. The next prime is 6497683. The reversal of 6497664 is 4667946.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8077 + ... + 8844.

Almost surely, 2^6497664 is an apocalyptic number.

6497664 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

6497664 is an abundant number, since it is smaller than the sum of its proper divisors (10762776).

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

6497664 is a wasteful number, since it uses less digits than its factorization.

6497664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16938 (or 16926 counting only the distinct ones).

The product of its digits is 217728, while the sum is 42.

The square root of 6497664 is about 2549.0515883363. The cubic root of 6497664 is about 186.6031983773.

It can be divided in two parts, 6 and 497664, that multiplied together give a 6-th power (2985984 = 12⁶).

The spelling of 6497664 in words is "six million, four hundred ninety-seven thousand, six hundred sixty-four".