2665560001 has 4 divisors (see below), whose sum is σ = 2870603092. Its totient is φ = 2460516912.

The previous prime is 2665559933. The next prime is 2665560013. The reversal of 2665560001 is 1000655662.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 745017025 + 1920542976 = 27295^2 + 43824^2 .

It is a cyclic number.

It is not a de Polignac number, because 2665560001 - 2⁷ = 2665559873 is a prime.

It is a super-2 number, since 2×2665560001² = 14210420237862240002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2665560041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102521526 + ... + 102521551.

It is an arithmetic number, because the mean of its divisors is an integer number (717650773).

Almost surely, 2^2665560001 is an apocalyptic number.

It is an amenable number.

2665560001 is a deficient number, since it is larger than the sum of its proper divisors (205043091).

2665560001 is a wasteful number, since it uses less digits than its factorization.

2665560001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205043090.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 2665560001 is about 51629.0615932539. The cubic root of 2665560001 is about 1386.5306923795.

The spelling of 2665560001 in words is "two billion, six hundred sixty-five million, five hundred sixty thousand, one".