54553666 has 4 divisors (see below), whose sum is σ = 81830502. Its totient is φ = 27276832.

The previous prime is 54553649. The next prime is 54553711. The reversal of 54553666 is 66635545.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 52258441 + 2295225 = 7229^2 + 1515^2 .

It is a super-2 number, since 2×54553666² = 5952204948079112, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13638415 + ... + 13638418.

Almost surely, 2^54553666 is an apocalyptic number.

54553666 is a deficient number, since it is larger than the sum of its proper divisors (27276836).

54553666 is a wasteful number, since it uses less digits than its factorization.

54553666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27276835.

The product of its digits is 324000, while the sum is 40.

The square root of 54553666 is about 7386.0453559398. The cubic root of 54553666 is about 379.2637313360.

The spelling of 54553666 in words is "fifty-four million, five hundred fifty-three thousand, six hundred sixty-six".