13666497854 has 4 divisors (see below), whose sum is σ = 20499746784. Its totient is φ = 6833248926.

The previous prime is 13666497769. The next prime is 13666497893. The reversal of 13666497854 is 45879466631.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 13666497793 and 13666497802.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3416624462 + ... + 3416624465.

It is an arithmetic number, because the mean of its divisors is an integer number (5124936696).

Almost surely, 2^13666497854 is an apocalyptic number.

13666497854 is a deficient number, since it is larger than the sum of its proper divisors (6833248930).

13666497854 is an equidigital number, since it uses as much as digits as its factorization.

13666497854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6833248929.

The product of its digits is 26127360, while the sum is 59.

The spelling of 13666497854 in words is "thirteen billion, six hundred sixty-six million, four hundred ninety-seven thousand, eight hundred fifty-four".