5661570 has 16 divisors (see below), whose sum is σ = 13587840. Its totient is φ = 1509744.

The previous prime is 5661559. The next prime is 5661587. The reversal of 5661570 is 751665.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 188719 = 5661570 / (5 + 6 + 6 + 1 + 5 + 7 + 0).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94330 + ... + 94389.

It is an arithmetic number, because the mean of its divisors is an integer number (849240).

Almost surely, 2^5661570 is an apocalyptic number.

5661570 is an abundant number, since it is smaller than the sum of its proper divisors (7926270).

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

5661570 is a wasteful number, since it uses less digits than its factorization.

5661570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188729.

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 5661570 is about 2379.4053879068. The cubic root of 5661570 is about 178.2292421538.

The spelling of 5661570 in words is "five million, six hundred sixty-one thousand, five hundred seventy".