6642877627966 has 32 divisors (see below), whose sum is σ = 10501594997760. Its totient is φ = 3142776311136.

The previous prime is 6642877627921. The next prime is 6642877628003. The reversal of 6642877627966 is 6697267782466.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 6642877627892 and 6642877627901.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108856635 + ... + 108917641.

It is an arithmetic number, because the mean of its divisors is an integer number (328174843680).

Almost surely, 2^{6642877627966} is an apocalyptic number.

6642877627966 is a deficient number, since it is larger than the sum of its proper divisors (3858717369794).

6642877627966 is a wasteful number, since it uses less digits than its factorization.

6642877627966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64488.

The product of its digits is 3072577536, while the sum is 76.

The spelling of 6642877627966 in words is "six trillion, six hundred forty-two billion, eight hundred seventy-seven million, six hundred twenty-seven thousand, nine hundred sixty-six".