5661450 has 72 divisors (see below), whose sum is σ = 15900768. Its totient is φ = 1441440.

The previous prime is 5661421. The next prime is 5661451. The reversal of 5661450 is 541665.

It is a happy number.

It is a super-2 number, since 2×5661450² = 64104032205000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5661451) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 10077 + ... + 10623.

It is an arithmetic number, because the mean of its divisors is an integer number (220844).

Almost surely, 2^5661450 is an apocalyptic number.

5661450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 5661450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7950384).

5661450 is an abundant number, since it is smaller than the sum of its proper divisors (10239318).

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

5661450 is a wasteful number, since it uses less digits than its factorization.

5661450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588 (or 580 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 5661450 is about 2379.3801713892. The cubic root of 5661450 is about 178.2279829236.

It can be divided in two parts, 566 and 1450, that added together give a triangular number (2016 = T₆₃).

The spelling of 5661450 in words is "five million, six hundred sixty-one thousand, four hundred fifty".