3666405320 has 64 divisors (see below), whose sum is σ = 8647309440. Its totient is φ = 1397491200.

The previous prime is 3666405313. The next prime is 3666405329. The reversal of 3666405320 is 235046663.

3666405320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (3666405329) 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, 44525 + ... + 96515.

It is an arithmetic number, because the mean of its divisors is an integer number (135114210).

Almost surely, 2^3666405320 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3666405320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4323654720).

3666405320 is an abundant number, since it is smaller than the sum of its proper divisors (4980904120).

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

3666405320 is a wasteful number, since it uses less digits than its factorization.

3666405320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52086 (or 52082 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 35.

The square root of 3666405320 is about 60550.8490444189. The cubic root of 3666405320 is about 1541.9850322914.

The spelling of 3666405320 in words is "three billion, six hundred sixty-six million, four hundred five thousand, three hundred twenty".