6640708 has 6 divisors (see below), whose sum is σ = 11621246. Its totient is φ = 3320352.

The previous prime is 6640687. The next prime is 6640757. The reversal of 6640708 is 8070466.

It can be written as a sum of positive squares in only one way, i.e., 6543364 + 97344 = 2558^2 + 312^2 .

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 6640708.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830085 + ... + 830092.

Almost surely, 2^6640708 is an apocalyptic number.

It is an amenable number.

6640708 is a deficient number, since it is larger than the sum of its proper divisors (4980538).

6640708 is a wasteful number, since it uses less digits than its factorization.

6640708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1660181 (or 1660179 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 6640708 is about 2576.9571203262. The cubic root of 6640708 is about 187.9626076229.

The spelling of 6640708 in words is "six million, six hundred forty thousand, seven hundred eight".