6649164 has 36 divisors (see below), whose sum is σ = 17694040. Its totient is φ = 2099520.

The previous prime is 6649163. The next prime is 6649189. The reversal of 6649164 is 4619466.

6649164 is a `hidden beast` number, since 6 + 649 + 1 + 6 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×6649164² = 88422763797792, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (6649163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4177 + ... + 5544.

Almost surely, 2^6649164 is an apocalyptic number.

It is an amenable number.

6649164 is an abundant number, since it is smaller than the sum of its proper divisors (11044876).

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

6649164 is a wasteful number, since it uses less digits than its factorization.

6649164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9750 (or 9745 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 6649164 is about 2578.5972931034. The cubic root of 6649164 is about 188.0423550262.

The spelling of 6649164 in words is "six million, six hundred forty-nine thousand, one hundred sixty-four".