5666538 has 16 divisors (see below), whose sum is σ = 11356416. Its totient is φ = 1884960.

The previous prime is 5666527. The next prime is 5666539. The reversal of 5666538 is 8356665.

It is a junction number, because it is equal to n+sod(n) for n = 5666496 and 5666505.

It is not an unprimeable number, because it can be changed into a prime (5666539) 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, 5223 + ... + 6213.

It is an arithmetic number, because the mean of its divisors is an integer number (709776).

Almost surely, 2^5666538 is an apocalyptic number.

5666538 is an abundant number, since it is smaller than the sum of its proper divisors (5689878).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5666538 is a wasteful number, since it uses less digits than its factorization.

5666538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1949.

The product of its digits is 129600, while the sum is 39.

The square root of 5666538 is about 2380.4491172886. The cubic root of 5666538 is about 178.2813586757.

The spelling of 5666538 in words is "five million, six hundred sixty-six thousand, five hundred thirty-eight".