2660808506 has 4 divisors (see below), whose sum is σ = 3991212762. Its totient is φ = 1330404252.

The previous prime is 2660808487. The next prime is 2660808511. The reversal of 2660808506 is 6058080662.

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

It can be written as a sum of positive squares in only one way, i.e., 1887468025 + 773340481 = 43445^2 + 27809^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665202125 + ... + 665202128.

Almost surely, 2^2660808506 is an apocalyptic number.

2660808506 is a deficient number, since it is larger than the sum of its proper divisors (1330404256).

2660808506 is a wasteful number, since it uses less digits than its factorization.

2660808506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330404255.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 2660808506 is about 51583.0253668782. The cubic root of 2660808506 is about 1385.7063487685.

The spelling of 2660808506 in words is "two billion, six hundred sixty million, eight hundred eight thousand, five hundred six".