3665574 has 80 divisors (see below), whose sum is σ = 9565776. Its totient is φ = 1045440.

The previous prime is 3665573. The next prime is 3665581. The reversal of 3665574 is 4755663.

3665574 = T₉₇ + T₉₈ + ... + T₂₈₃.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3665573) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 215614 + ... + 215630.

Almost surely, 2^3665574 is an apocalyptic number.

3665574 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3665574, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4782888).

3665574 is an abundant number, since it is smaller than the sum of its proper divisors (5900202).

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

3665574 is a wasteful number, since it uses less digits than its factorization.

3665574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64 (or 33 counting only the distinct ones).

The product of its digits is 75600, while the sum is 36.

The square root of 3665574 is about 1914.5688809756. The cubic root of 3665574 is about 154.1868480357.

The spelling of 3665574 in words is "three million, six hundred sixty-five thousand, five hundred seventy-four".