2665111625520 has 160 divisors (see below), whose sum is σ = 8574583691520. Its totient is φ = 683953966080.

The previous prime is 2665111625489. The next prime is 2665111625567. The reversal of 2665111625520 is 255261115662.

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, 1513075 + ... + 2760365.

It is an arithmetic number, because the mean of its divisors is an integer number (53591148072).

Almost surely, 2^{2665111625520} is an apocalyptic number.

2665111625520 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 2665111625520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4287291845760).

2665111625520 is an abundant number, since it is smaller than the sum of its proper divisors (5909472066000).

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

2665111625520 is a wasteful number, since it uses less digits than its factorization.

2665111625520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247643 (or 1247637 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 42.

The spelling of 2665111625520 in words is "two trillion, six hundred sixty-five billion, one hundred eleven million, six hundred twenty-five thousand, five hundred twenty".