13554661 has 4 divisors (see below), whose sum is σ = 14352012. Its totient is φ = 12757312.

The previous prime is 13554649. The next prime is 13554677. The reversal of 13554661 is 16645531.

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 10336225 + 3218436 = 3215^2 + 1794^2 .

It is a cyclic number.

It is not a de Polignac number, because 13554661 - 2¹³ = 13546469 is a prime.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13554631) 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, 398650 + ... + 398683.

It is an arithmetic number, because the mean of its divisors is an integer number (3588003).

Almost surely, 2^13554661 is an apocalyptic number.

It is an amenable number.

13554661 is a deficient number, since it is larger than the sum of its proper divisors (797351).

13554661 is an equidigital number, since it uses as much as digits as its factorization.

13554661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797350.

The product of its digits is 10800, while the sum is 31.

The square root of 13554661 is about 3681.6655198429. The cubic root of 13554661 is about 238.4310914380.

The spelling of 13554661 in words is "thirteen million, five hundred fifty-four thousand, six hundred sixty-one".