5661818 has 8 divisors (see below), whose sum is σ = 8862048. Its totient is φ = 2707804.

The previous prime is 5661811. The next prime is 5661823. The reversal of 5661818 is 8181665.

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

5661818 is a modest number, since divided by 1818 gives 566 as remainder.

It is not an unprimeable number, because it can be changed into a prime (5661811) 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, 61496 + ... + 61587.

It is an arithmetic number, because the mean of its divisors is an integer number (1107756).

Almost surely, 2^5661818 is an apocalyptic number.

5661818 is a deficient number, since it is larger than the sum of its proper divisors (3200230).

5661818 is a wasteful number, since it uses less digits than its factorization.

5661818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123108.

The product of its digits is 11520, while the sum is 35.

The square root of 5661818 is about 2379.4575011964. The cubic root of 5661818 is about 178.2318445065.

The spelling of 5661818 in words is "five million, six hundred sixty-one thousand, eight hundred eighteen".