13665665392666 has 32 divisors (see below), whose sum is σ = 23670940954752. Its totient is φ = 5795705364480.

The previous prime is 13665665392663. The next prime is 13665665392699. The reversal of 13665665392666 is 66629356656631.

It is a junction number, because it is equal to n+sod(n) for n = 13665665392595 and 13665665392604.

It is not an unprimeable number, because it can be changed into a prime (13665665392663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12061465 + ... + 13145731.

It is an arithmetic number, because the mean of its divisors is an integer number (739716904836).

Almost surely, 2^{13665665392666} is an apocalyptic number.

13665665392666 is a deficient number, since it is larger than the sum of its proper divisors (10005275562086).

13665665392666 is a wasteful number, since it uses less digits than its factorization.

13665665392666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093654.

The product of its digits is 1133740800, while the sum is 70.

The spelling of 13665665392666 in words is "thirteen trillion, six hundred sixty-five billion, six hundred sixty-five million, three hundred ninety-two thousand, six hundred sixty-six".