2665660628 has 12 divisors (see below), whose sum is σ = 4825765140. Its totient is φ = 1286870592.

The previous prime is 2665660607. The next prime is 2665660637. The reversal of 2665660628 is 8260665662.

It can be written as a sum of positive squares in 2 ways, for example, as 1746236944 + 919423684 = 41788^2 + 30322^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11489801 + ... + 11490032.

It is an arithmetic number, because the mean of its divisors is an integer number (402147095).

Almost surely, 2^2665660628 is an apocalyptic number.

It is an amenable number.

2665660628 is a deficient number, since it is larger than the sum of its proper divisors (2160104512).

2665660628 is a wasteful number, since it uses less digits than its factorization.

2665660628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22979866 (or 22979864 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 47.

The square root of 2665660628 is about 51630.0361030282. The cubic root of 2665660628 is about 1386.5481397037.

The spelling of 2665660628 in words is "two billion, six hundred sixty-five million, six hundred sixty thousand, six hundred twenty-eight".