3665580 has 48 divisors (see below), whose sum is σ = 10348800. Its totient is φ = 969408.

The previous prime is 3665573. The next prime is 3665581. The reversal of 3665580 is 855663.

3665580 = 283² + 284² + ... + 322².

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3665581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11787 + ... + 12093.

It is an arithmetic number, because the mean of its divisors is an integer number (215600).

Almost surely, 2^3665580 is an apocalyptic number.

3665580 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3665580 is an abundant number, since it is smaller than the sum of its proper divisors (6683220).

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

3665580 is a wasteful number, since it uses less digits than its factorization.

3665580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518 (or 516 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 3665580 is about 1914.5704479073. The cubic root of 3665580 is about 154.1869321627.

The spelling of 3665580 in words is "three million, six hundred sixty-five thousand, five hundred eighty".