6618366638166 has 64 divisors (see below), whose sum is σ = 14048774550720. Its totient is φ = 2071405301760.

The previous prime is 6618366638131. The next prime is 6618366638167.

6618366638166 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 6618366638097 and 6618366638106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6618366638167) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94973376 + ... + 95043036.

It is an arithmetic number, because the mean of its divisors is an integer number (219512102355).

Almost surely, 2^{6618366638166} is an apocalyptic number.

6618366638166 is an abundant number, since it is smaller than the sum of its proper divisors (7430407912554).

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

6618366638166 is a wasteful number, since it uses less digits than its factorization.

6618366638166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71889.

The product of its digits is 161243136, while the sum is 66.

The spelling of 6618366638166 in words is "six trillion, six hundred eighteen billion, three hundred sixty-six million, six hundred thirty-eight thousand, one hundred sixty-six".