1665166116 has 96 divisors (see below), whose sum is σ = 4273274880. Its totient is φ = 502387200.

The previous prime is 1665166103. The next prime is 1665166127. The reversal of 1665166116 is 6116615661.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1131261 + ... + 1132731.

It is an arithmetic number, because the mean of its divisors is an integer number (44513280).

Almost surely, 2^1665166116 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 1665166116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2136637440).

1665166116 is an abundant number, since it is smaller than the sum of its proper divisors (2608108764).

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

1665166116 is a wasteful number, since it uses less digits than its factorization.

1665166116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1705 (or 1703 counting only the distinct ones).

The product of its digits is 38880, while the sum is 39.

The square root of 1665166116 is about 40806.4469906411. The cubic root of 1665166116 is about 1185.2751747501.

The spelling of 1665166116 in words is "one billion, six hundred sixty-five million, one hundred sixty-six thousand, one hundred sixteen".