552403661 has 4 divisors (see below), whose sum is σ = 584898012. Its totient is φ = 519909312.

The previous prime is 552403609. The next prime is 552403667. The reversal of 552403661 is 166304255.

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 305725225 + 246678436 = 17485^2 + 15706^2 .

It is a cyclic number.

It is not a de Polignac number, because 552403661 - 2⁶ = 552403597 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 (552403667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16247150 + ... + 16247183.

It is an arithmetic number, because the mean of its divisors is an integer number (146224503).

Almost surely, 2^552403661 is an apocalyptic number.

It is an amenable number.

552403661 is a deficient number, since it is larger than the sum of its proper divisors (32494351).

552403661 is a wasteful number, since it uses less digits than its factorization.

552403661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32494350.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 552403661 is about 23503.2691555877. The cubic root of 552403661 is about 820.5130940075.

The spelling of 552403661 in words is "five hundred fifty-two million, four hundred three thousand, six hundred sixty-one".