6643340252 has 12 divisors (see below), whose sum is σ = 11765916456. Its totient is φ = 3281649840.

The previous prime is 6643340243. The next prime is 6643340267. The reversal of 6643340252 is 2520433466.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10004699 + ... + 10005362.

It is an arithmetic number, because the mean of its divisors is an integer number (980493038).

Almost surely, 2^6643340252 is an apocalyptic number.

It is an amenable number.

6643340252 is a deficient number, since it is larger than the sum of its proper divisors (5122576204).

6643340252 is a wasteful number, since it uses less digits than its factorization.

6643340252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20010148 (or 20010146 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 35.

The square root of 6643340252 is about 81506.6883881317. The cubic root of 6643340252 is about 1879.8743929209.

The spelling of 6643340252 in words is "six billion, six hundred forty-three million, three hundred forty thousand, two hundred fifty-two".