5126656665 has 64 divisors (see below), whose sum is σ = 9326741760. Its totient is φ = 2390432256.

The previous prime is 5126656609. The next prime is 5126656679. The reversal of 5126656665 is 5666566215.

It is not a de Polignac number, because 5126656665 - 2¹² = 5126652569 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1335589 + ... + 1339421.

It is an arithmetic number, because the mean of its divisors is an integer number (145730340).

Almost surely, 2^5126656665 is an apocalyptic number.

It is an amenable number.

5126656665 is a deficient number, since it is larger than the sum of its proper divisors (4200085095).

5126656665 is a wasteful number, since it uses less digits than its factorization.

5126656665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3911 (or 3873 counting only the distinct ones).

The product of its digits is 1944000, while the sum is 48.

The square root of 5126656665 is about 71600.6750317342. The cubic root of 5126656665 is about 1724.2943738628.

The spelling of 5126656665 in words is "five billion, one hundred twenty-six million, six hundred fifty-six thousand, six hundred sixty-five".