6603556256642 has 4 divisors (see below), whose sum is σ = 9905334384966. Its totient is φ = 3301778128320.

The previous prime is 6603556256629. The next prime is 6603556256681. The reversal of 6603556256642 is 2466526553066.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 4612920268441 + 1990635988201 = 2147771^2 + 1410899^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1650889064159 + ... + 1650889064162.

Almost surely, 2^{6603556256642} is an apocalyptic number.

6603556256642 is a deficient number, since it is larger than the sum of its proper divisors (3301778128324).

6603556256642 is a wasteful number, since it uses less digits than its factorization.

6603556256642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3301778128323.

The product of its (nonzero) digits is 46656000, while the sum is 56.

The spelling of 6603556256642 in words is "six trillion, six hundred three billion, five hundred fifty-six million, two hundred fifty-six thousand, six hundred forty-two".