554661 has 8 divisors (see below), whose sum is σ = 821760. Its totient is φ = 369756.

The previous prime is 554641. The next prime is 554663. The reversal of 554661 is 166455.

It is a happy number.

554661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 554661 - 2⁶ = 554597 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 20543 = 554661 / (5 + 5 + 4 + 6 + 6 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (554663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10245 + ... + 10298.

It is an arithmetic number, because the mean of its divisors is an integer number (102720).

2⁵⁵⁴⁶⁶¹ is an apocalyptic number.

It is an amenable number.

554661 is a deficient number, since it is larger than the sum of its proper divisors (267099).

554661 is a wasteful number, since it uses less digits than its factorization.

554661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20552 (or 20546 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 554661 is about 744.7556646310. The cubic root of 554661 is about 82.1629221665.

The spelling of 554661 in words is "five hundred fifty-four thousand, six hundred sixty-one".