6662216557206 has 112 divisors (see below), whose sum is σ = 17379158325504. Its totient is φ = 1875079947312.

The previous prime is 6662216557193. The next prime is 6662216557211. The reversal of 6662216557206 is 6027556122666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 4187650 + ... + 5555253.

Almost surely, 2^{6662216557206} is an apocalyptic number.

6662216557206 is an abundant number, since it is smaller than the sum of its proper divisors (10716941768298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6662216557206 is an equidigital number, since it uses as much as digits as its factorization.

6662216557206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9742997 (or 9742982 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 54.

The spelling of 6662216557206 in words is "six trillion, six hundred sixty-two billion, two hundred sixteen million, five hundred fifty-seven thousand, two hundred six".