6535666685 has 8 divisors (see below), whose sum is σ = 7844364600. Its totient is φ = 5227490304.

The previous prime is 6535666651. The next prime is 6535666777. The reversal of 6535666685 is 5866665356.

It can be written as a sum of positive squares in 4 ways, for example, as 444956836 + 6090709849 = 21094^2 + 78043^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6535666685 - 2¹⁴ = 6535650301 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6535666685.

It is a congruent number.

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, 102260 + ... + 153389.

It is an arithmetic number, because the mean of its divisors is an integer number (980545575).

Almost surely, 2^6535666685 is an apocalyptic number.

It is an amenable number.

6535666685 is a deficient number, since it is larger than the sum of its proper divisors (1308697915).

6535666685 is a wasteful number, since it uses less digits than its factorization.

6535666685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260767.

The product of its digits is 23328000, while the sum is 56.

The square root of 6535666685 is about 80843.4702681670. The cubic root of 6535666685 is about 1869.6628487464.

The spelling of 6535666685 in words is "six billion, five hundred thirty-five million, six hundred sixty-six thousand, six hundred eighty-five".