553666161 has 4 divisors (see below), whose sum is σ = 738221552. Its totient is φ = 369110772.

The previous prime is 553666133. The next prime is 553666219. The reversal of 553666161 is 161666355.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 553666161 - 2⁷ = 553666033 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (553666961) 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, 92277691 + ... + 92277696.

It is an arithmetic number, because the mean of its divisors is an integer number (184555388).

Almost surely, 2^553666161 is an apocalyptic number.

It is an amenable number.

553666161 is a deficient number, since it is larger than the sum of its proper divisors (184555391).

553666161 is a wasteful number, since it uses less digits than its factorization.

553666161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184555390.

The product of its digits is 97200, while the sum is 39.

The square root of 553666161 is about 23530.1117931896. Note that the first 3 decimals coincide. The cubic root of 553666161 is about 821.1377034401.

The spelling of 553666161 in words is "five hundred fifty-three million, six hundred sixty-six thousand, one hundred sixty-one".