2505122666 has 16 divisors (see below), whose sum is σ = 3860587656. Its totient is φ = 1218283776.

The previous prime is 2505122623. The next prime is 2505122687. The reversal of 2505122666 is 6662215052.

It can be written as a sum of positive squares in 4 ways, for example, as 1825425625 + 679697041 = 42725^2 + 26071^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 361910 + ... + 368766.

Almost surely, 2^2505122666 is an apocalyptic number.

2505122666 is a deficient number, since it is larger than the sum of its proper divisors (1355464990).

2505122666 is a wasteful number, since it uses less digits than its factorization.

2505122666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11833.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 2505122666 is about 50051.2004451442. The cubic root of 2505122666 is about 1358.1351795089.

The spelling of 2505122666 in words is "two billion, five hundred five million, one hundred twenty-two thousand, six hundred sixty-six".