5505661 has 8 divisors (see below), whose sum is σ = 6306560. Its totient is φ = 4708368.

The previous prime is 5505653. The next prime is 5505667. The reversal of 5505661 is 1665055.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5505661 - 2³ = 5505653 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 (5505667) 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, 4780 + ... + 5818.

It is an arithmetic number, because the mean of its divisors is an integer number (788320).

Almost surely, 2^5505661 is an apocalyptic number.

It is an amenable number.

5505661 is a deficient number, since it is larger than the sum of its proper divisors (800899).

5505661 is a wasteful number, since it uses less digits than its factorization.

5505661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1803.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 5505661 is about 2346.4144987619. The cubic root of 5505661 is about 176.5779575211.

Subtracting from 5505661 its reverse (1665055), we obtain a triangular number (3840606 = T₂₇₇₁).

The spelling of 5505661 in words is "five million, five hundred five thousand, six hundred sixty-one".