5418661 has 4 divisors (see below), whose sum is σ = 5424300. Its totient is φ = 5413024.

The previous prime is 5418659. The next prime is 5418697. The reversal of 5418661 is 1668145.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 3150625 + 2268036 = 1775^2 + 1506^2 .

It is a cyclic number.

It is not a de Polignac number, because 5418661 - 2¹ = 5418659 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

5418661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5488661) 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, 976 + ... + 3433.

It is an arithmetic number, because the mean of its divisors is an integer number (1356075).

Almost surely, 2^5418661 is an apocalyptic number.

It is an amenable number.

5418661 is a deficient number, since it is larger than the sum of its proper divisors (5639).

5418661 is a wasteful number, since it uses less digits than its factorization.

5418661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5638.

The product of its digits is 5760, while the sum is 31.

The square root of 5418661 is about 2327.8017527272. The cubic root of 5418661 is about 175.6429248896.

The spelling of 5418661 in words is "five million, four hundred eighteen thousand, six hundred sixty-one".