3666520344 has 128 divisors (see below), whose sum is σ = 9948096000. Its totient is φ = 1122637824.

The previous prime is 3666520343. The next prime is 3666520357. The reversal of 3666520344 is 4430256663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3666520343) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3633312 + ... + 3634320.

It is an arithmetic number, because the mean of its divisors is an integer number (77719500).

Almost surely, 2^3666520344 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 3666520344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4974048000).

3666520344 is an abundant number, since it is smaller than the sum of its proper divisors (6281575656).

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

3666520344 is a wasteful number, since it uses less digits than its factorization.

3666520344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297 (or 1293 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 39.

The square root of 3666520344 is about 60551.7988502406. The cubic root of 3666520344 is about 1542.0011573890.

The spelling of 3666520344 in words is "three billion, six hundred sixty-six million, five hundred twenty thousand, three hundred forty-four".