554211661 has 4 divisors (see below), whose sum is σ = 554413024. Its totient is φ = 554010300.

The previous prime is 554211653. The next prime is 554211677. The reversal of 554211661 is 166112455.

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 a cyclic number.

It is not a de Polignac number, because 554211661 - 2³ = 554211653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (554211601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96495 + ... + 102076.

It is an arithmetic number, because the mean of its divisors is an integer number (138603256).

Almost surely, 2^554211661 is an apocalyptic number.

It is an amenable number.

554211661 is a deficient number, since it is larger than the sum of its proper divisors (201363).

554211661 is a wasteful number, since it uses less digits than its factorization.

554211661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201362.

The product of its digits is 7200, while the sum is 31.

The square root of 554211661 is about 23541.7004695923. The cubic root of 554211661 is about 821.4072904351.

The spelling of 554211661 in words is "five hundred fifty-four million, two hundred eleven thousand, six hundred sixty-one".