2665893888 has 156 divisors (see below), whose sum is σ = 8801458848. Its totient is φ = 761610240.

The previous prime is 2665893883. The next prime is 2665893899. The reversal of 2665893888 is 8883985662.

It is a Harshad number since it is a multiple of its sum of digits (63).

Its product of digits (39813120) is a multiple of the sum of its prime factors (10368).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2665893883) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 252883 + ... + 263213.

It is an arithmetic number, because the mean of its divisors is an integer number (56419608).

Almost surely, 2^2665893888 is an apocalyptic number.

2665893888 is a gapful number since it is divisible by the number (28) 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 2665893888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4400729424).

2665893888 is an abundant number, since it is smaller than the sum of its proper divisors (6135564960).

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

2665893888 is a wasteful number, since it uses less digits than its factorization.

2665893888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10368 (or 10343 counting only the distinct ones).

The product of its digits is 39813120, while the sum is 63.

The square root of 2665893888 is about 51632.2950100032. The cubic root of 2665893888 is about 1386.5885820593.

The spelling of 2665893888 in words is "two billion, six hundred sixty-five million, eight hundred ninety-three thousand, eight hundred eighty-eight".