3665040220 has 24 divisors (see below), whose sum is σ = 7697895408. Its totient is φ = 1465766400.

The previous prime is 3665040209. The next prime is 3665040241. The reversal of 3665040220 is 220405663.

It is a happy number.

3665040220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent 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, 145135 + ... + 168505.

It is an arithmetic number, because the mean of its divisors is an integer number (320745642).

Almost surely, 2^3665040220 is an apocalyptic number.

It is an amenable number.

3665040220 is an abundant number, since it is smaller than the sum of its proper divisors (4032855188).

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

3665040220 is a wasteful number, since it uses less digits than its factorization.

3665040220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31221 (or 31219 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 3665040220 is about 60539.5756509740. The cubic root of 3665040220 is about 1541.7936345523.

Adding to 3665040220 its reverse (220405663), we get a palindrome (3885445883).

The spelling of 3665040220 in words is "three billion, six hundred sixty-five million, forty thousand, two hundred twenty".