6641644 has 6 divisors (see below), whose sum is σ = 11622884. Its totient is φ = 3320820.

The previous prime is 6641633. The next prime is 6641669. The reversal of 6641644 is 4461466.

It is a super-2 number, since 2×6641644² = 88222870045472, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830202 + ... + 830209.

Almost surely, 2^6641644 is an apocalyptic number.

It is an amenable number.

6641644 is a deficient number, since it is larger than the sum of its proper divisors (4981240).

6641644 is a wasteful number, since it uses less digits than its factorization.

6641644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1660415 (or 1660413 counting only the distinct ones).

The product of its digits is 13824, while the sum is 31.

The square root of 6641644 is about 2577.1387234683. The cubic root of 6641644 is about 187.9714382444.

The spelling of 6641644 in words is "six million, six hundred forty-one thousand, six hundred forty-four".