2665171880 has 32 divisors (see below), whose sum is σ = 6853299840. Its totient is φ = 913773120.

The previous prime is 2665171877. The next prime is 2665171907. The reversal of 2665171880 is 881715662.

It is a happy number.

It is a super-2 number, since 2×2665171880² = 14206282299885468800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4758956 + ... + 4759515.

It is an arithmetic number, because the mean of its divisors is an integer number (214165620).

Almost surely, 2^2665171880 is an apocalyptic number.

2665171880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2665171880 is an abundant number, since it is smaller than the sum of its proper divisors (4188127960).

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

2665171880 is a wasteful number, since it uses less digits than its factorization.

2665171880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9518489 (or 9518485 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 44.

The square root of 2665171880 is about 51625.3027109769. The cubic root of 2665171880 is about 1386.4633934755.

The spelling of 2665171880 in words is "two billion, six hundred sixty-five million, one hundred seventy-one thousand, eight hundred eighty".