6646900 has 36 divisors (see below), whose sum is σ = 15536332. Its totient is φ = 2453760.

The previous prime is 6646891. The next prime is 6646907. The reversal of 6646900 is 96466.

It can be written as a sum of positive squares in 6 ways, for example, as 2630884 + 4016016 = 1622^2 + 2004^2 .

It is a super-2 number, since 2×6646900² = 88362559220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6646907) 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, 1257 + ... + 3856.

Almost surely, 2^6646900 is an apocalyptic number.

It is an amenable number.

6646900 is an abundant number, since it is smaller than the sum of its proper divisors (8889432).

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

6646900 is a wasteful number, since it uses less digits than its factorization.

6646900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5140 (or 5133 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 6646900 is about 2578.1582573613. The cubic root of 6646900 is about 188.0210101764.

The spelling of 6646900 in words is "six million, six hundred forty-six thousand, nine hundred".