6641604 has 18 divisors (see below), whose sum is σ = 16788590. Its totient is φ = 2213856.

The previous prime is 6641587. The next prime is 6641633. The reversal of 6641604 is 4061466.

It can be written as a sum of positive squares in only one way, i.e., 3572100 + 3069504 = 1890^2 + 1752^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×6641604² = 88221807385632, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 92209 + ... + 92280.

Almost surely, 2^6641604 is an apocalyptic number.

It is an amenable number.

6641604 is an abundant number, since it is smaller than the sum of its proper divisors (10146986).

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

6641604 is a wasteful number, since it uses less digits than its factorization.

6641604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184499 (or 184494 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 6641604 is about 2577.1309629121. The cubic root of 6641604 is about 187.9710608844.

The spelling of 6641604 in words is "six million, six hundred forty-one thousand, six hundred four".