2686665666536 has 32 divisors (see below), whose sum is σ = 5185188311040. Its totient is φ = 1304398888128.

The previous prime is 2686665666521. The next prime is 2686665666541. The reversal of 2686665666536 is 6356665666862.

It is a self number, because there is not a number n which added to its sum of digits gives 2686665666536.

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, 28083695 + ... + 28179198.

It is an arithmetic number, because the mean of its divisors is an integer number (162037134720).

Almost surely, 2^{2686665666536} is an apocalyptic number.

It is an amenable number.

2686665666536 is a deficient number, since it is larger than the sum of its proper divisors (2498522644504).

2686665666536 is a wasteful number, since it uses less digits than its factorization.

2686665666536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56263073 (or 56263069 counting only the distinct ones).

The product of its digits is 2015539200, while the sum is 71.

The spelling of 2686665666536 in words is "two trillion, six hundred eighty-six billion, six hundred sixty-five million, six hundred sixty-six thousand, five hundred thirty-six".