6640148 has 6 divisors (see below), whose sum is σ = 11620266. Its totient is φ = 3320072.

The previous prime is 6640129. The next prime is 6640157. The reversal of 6640148 is 8410466.

It can be written as a sum of positive squares in only one way, i.e., 6615184 + 24964 = 2572^2 + 158^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6640148.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830015 + ... + 830022.

It is an arithmetic number, because the mean of its divisors is an integer number (1936711).

Almost surely, 2^6640148 is an apocalyptic number.

It is an amenable number.

6640148 is a deficient number, since it is larger than the sum of its proper divisors (4980118).

6640148 is a wasteful number, since it uses less digits than its factorization.

6640148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1660041 (or 1660039 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 6640148 is about 2576.8484627545. The cubic root of 6640148 is about 187.9573239484.

The spelling of 6640148 in words is "six million, six hundred forty thousand, one hundred forty-eight".