13661065426 has 8 divisors (see below), whose sum is σ = 20495766924. Its totient is φ = 6829143120.

The previous prime is 13661065423. The next prime is 13661065427. The reversal of 13661065426 is 62456016631.

13661065426 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 13076151201 + 584914225 = 114351^2 + 24185^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×13661065426² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13661065423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 682465 + ... + 702196.

Almost surely, 2^13661065426 is an apocalyptic number.

13661065426 is a deficient number, since it is larger than the sum of its proper divisors (6834701498).

13661065426 is a wasteful number, since it uses less digits than its factorization.

13661065426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1389596.

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 13661065426 in words is "thirteen billion, six hundred sixty-one million, sixty-five thousand, four hundred twenty-six".