23666509664655 has 64 divisors (see below), whose sum is σ = 44509440148992. Its totient is φ = 10586522903040.

The previous prime is 23666509664621. The next prime is 23666509664683. The reversal of 23666509664655 is 55646690566632.

It is not a de Polignac number, because 23666509664655 - 2⁶ = 23666509664591 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23666509664655.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1292344 + ... + 7000226.

It is an arithmetic number, because the mean of its divisors is an integer number (695460002328).

Almost surely, 2^{23666509664655} is an apocalyptic number.

23666509664655 is a deficient number, since it is larger than the sum of its proper divisors (20842930484337).

23666509664655 is a wasteful number, since it uses less digits than its factorization.

23666509664655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5709848.

The product of its (nonzero) digits is 1259712000, while the sum is 69.

The spelling of 23666509664655 in words is "twenty-three trillion, six hundred sixty-six billion, five hundred nine million, six hundred sixty-four thousand, six hundred fifty-five".