13894866661 has 4 divisors (see below), whose sum is σ = 14963702572. Its totient is φ = 12826030752.

The previous prime is 13894866659. The next prime is 13894866677. The reversal of 13894866661 is 16666849831.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1177793761 + 12717072900 = 34319^2 + 112770^2 .

It is a cyclic number.

It is not a de Polignac number, because 13894866661 - 2¹ = 13894866659 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13894866596 and 13894866605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13894866641) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 534417936 + ... + 534417961.

It is an arithmetic number, because the mean of its divisors is an integer number (3740925643).

Almost surely, 2^13894866661 is an apocalyptic number.

It is an amenable number.

13894866661 is a deficient number, since it is larger than the sum of its proper divisors (1068835911).

13894866661 is a wasteful number, since it uses less digits than its factorization.

13894866661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068835910.

The product of its digits is 8957952, while the sum is 58.

The spelling of 13894866661 in words is "thirteen billion, eight hundred ninety-four million, eight hundred sixty-six thousand, six hundred sixty-one".