2665501568 has 64 divisors (see below), whose sum is σ = 5396183520. Its totient is φ = 1311344640.

The previous prime is 2665501541. The next prime is 2665501607. The reversal of 2665501568 is 8651055662.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2385746 + ... + 2386862.

Almost surely, 2^2665501568 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 2665501568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2698091760).

2665501568 is an abundant number, since it is smaller than the sum of its proper divisors (2730681952).

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

2665501568 is a wasteful number, since it uses less digits than its factorization.

2665501568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1415 (or 1403 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 44.

The square root of 2665501568 is about 51628.4956976281. The cubic root of 2665501568 is about 1386.5205607074.

The spelling of 2665501568 in words is "two billion, six hundred sixty-five million, five hundred one thousand, five hundred sixty-eight".