6665520710605 has 64 divisors (see below), whose sum is σ = 8885950594560. Its totient is φ = 4776742526976.

The previous prime is 6665520710593. The next prime is 6665520710669. The reversal of 6665520710605 is 5060170255666.

It is not a de Polignac number, because 6665520710605 - 2¹¹ = 6665520708557 is a prime.

It is a congruent number.

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, 374816544 + ... + 374834326.

It is an arithmetic number, because the mean of its divisors is an integer number (138842978040).

Almost surely, 2^{6665520710605} is an apocalyptic number.

It is an amenable number.

6665520710605 is a deficient number, since it is larger than the sum of its proper divisors (2220429883955).

6665520710605 is a wasteful number, since it uses less digits than its factorization.

6665520710605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19990.

The product of its (nonzero) digits is 2268000, while the sum is 49.

The spelling of 6665520710605 in words is "six trillion, six hundred sixty-five billion, five hundred twenty million, seven hundred ten thousand, six hundred five".