6640222644242 has 32 divisors (see below), whose sum is σ = 11044658275200. Its totient is φ = 2968611782400.

The previous prime is 6640222644239. The next prime is 6640222644271. The reversal of 6640222644242 is 2424462220466.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 6640222644193 and 6640222644202.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21816059 + ... + 22118337.

It is an arithmetic number, because the mean of its divisors is an integer number (345145571100).

Almost surely, 2^{6640222644242} is an apocalyptic number.

6640222644242 is a deficient number, since it is larger than the sum of its proper divisors (4404435630958).

6640222644242 is a wasteful number, since it uses less digits than its factorization.

6640222644242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318722.

The product of its (nonzero) digits is 1769472, while the sum is 44.

The spelling of 6640222644242 in words is "six trillion, six hundred forty billion, two hundred twenty-two million, six hundred forty-four thousand, two hundred forty-two".