6433664 has 16 divisors (see below), whose sum is σ = 12817320. Its totient is φ = 3216768.

The previous prime is 6433643. The next prime is 6433699. The reversal of 6433664 is 4663346.

It is a tau number, because it is divible by the number of its divisors (16).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 6433664.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25004 + ... + 25259.

Almost surely, 2^6433664 is an apocalyptic number.

6433664 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

6433664 is a deficient number, since it is larger than the sum of its proper divisors (6383656).

6433664 is an equidigital number, since it uses as much as digits as its factorization.

6433664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50277 (or 50265 counting only the distinct ones).

The product of its digits is 31104, while the sum is 32.

The square root of 6433664 is about 2536.4668340036. The cubic root of 6433664 is about 185.9885143407.

The spelling of 6433664 in words is "six million, four hundred thirty-three thousand, six hundred sixty-four".