2665169489920 has 416 divisors, whose sum is σ = 7483716979200. Its totient is φ = 910682357760.

The previous prime is 2665169489911. The next prime is 2665169489947. The reversal of 2665169489920 is 299849615662.

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, 3238358629 + ... + 3238359451.

Almost surely, 2^{2665169489920} is an apocalyptic number.

2665169489920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2665169489920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3741858489600).

2665169489920 is an abundant number, since it is smaller than the sum of its proper divisors (4818547489280).

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

2665169489920 is an frugal number, since it uses more digits than its factorization.

2665169489920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1334 (or 1298 counting only the distinct ones).

The product of its (nonzero) digits is 100776960, while the sum is 67.

The spelling of 2665169489920 in words is "two trillion, six hundred sixty-five billion, one hundred sixty-nine million, four hundred eighty-nine thousand, nine hundred twenty".