1666511106 has 16 divisors (see below), whose sum is σ = 3589408704. Its totient is φ = 512772624.

The previous prime is 1666511029. The next prime is 1666511111. The reversal of 1666511106 is 6011156661.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10682686 + ... + 10682841.

It is an arithmetic number, because the mean of its divisors is an integer number (224338044).

Almost surely, 2^1666511106 is an apocalyptic number.

1666511106 is an abundant number, since it is smaller than the sum of its proper divisors (1922897598).

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

1666511106 is a wasteful number, since it uses less digits than its factorization.

1666511106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21365545.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 1666511106 is about 40822.9237806407. The cubic root of 1666511106 is about 1185.5942128361.

Adding to 1666511106 its reverse (6011156661), we get a palindrome (7677667767).

The spelling of 1666511106 in words is "one billion, six hundred sixty-six million, five hundred eleven thousand, one hundred six".