2660509345 has 16 divisors (see below), whose sum is σ = 3462943680. Its totient is φ = 1950542784.

The previous prime is 2660509343. The next prime is 2660509351. The reversal of 2660509345 is 5439050662.

It is a cyclic number.

It is not a de Polignac number, because 2660509345 - 2¹ = 2660509343 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2660509298 and 2660509307.

It is not an unprimeable number, because it can be changed into a prime (2660509343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138199 + ... + 156268.

It is an arithmetic number, because the mean of its divisors is an integer number (216433980).

Almost surely, 2^2660509345 is an apocalyptic number.

It is an amenable number.

2660509345 is a deficient number, since it is larger than the sum of its proper divisors (802434335).

2660509345 is a wasteful number, since it uses less digits than its factorization.

2660509345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294624.

The product of its (nonzero) digits is 194400, while the sum is 40.

The square root of 2660509345 is about 51580.1254845313. The cubic root of 2660509345 is about 1385.6544140735.

The spelling of 2660509345 in words is "two billion, six hundred sixty million, five hundred nine thousand, three hundred forty-five".