6640010 has 24 divisors (see below), whose sum is σ = 12945420. Its totient is φ = 2451072.

The previous prime is 6640009. The next prime is 6640021. The reversal of 6640010 is 100466.

It can be written as a sum of positive squares in 6 ways, for example, as 101761 + 6538249 = 319^2 + 2557^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 275 + ... + 3654.

Almost surely, 2^6640010 is an apocalyptic number.

6640010 is a deficient number, since it is larger than the sum of its proper divisors (6305410).

6640010 is a wasteful number, since it uses less digits than its factorization.

6640010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3962 (or 3949 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 6640010 is about 2576.8216857206. The cubic root of 6640010 is about 187.9560218544.

Adding to 6640010 its reverse (100466), we get a palindrome (6740476).

The spelling of 6640010 in words is "six million, six hundred forty thousand, ten".