1666073108 has 60 divisors (see below), whose sum is σ = 3474674112. Its totient is φ = 698649840.

The previous prime is 1666073099. The next prime is 1666073119. The reversal of 1666073108 is 8013706661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 449543 + ... + 453233.

Almost surely, 2^1666073108 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1666073108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1737337056).

1666073108 is an abundant number, since it is smaller than the sum of its proper divisors (1808601004).

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

1666073108 is an equidigital number, since it uses as much as digits as its factorization.

1666073108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3770 (or 3747 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 1666073108 is about 40817.5588197041. The cubic root of 1666073108 is about 1185.4903364618.

Adding to 1666073108 its reverse (8013706661), we get a palindrome (9679779769).

The spelling of 1666073108 in words is "one billion, six hundred sixty-six million, seventy-three thousand, one hundred eight".