3661000660 has 48 divisors (see below), whose sum is σ = 8172964800. Its totient is φ = 1372736000.

The previous prime is 3661000639. The next prime is 3661000661. The reversal of 3661000660 is 660001663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3661000661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63891 + ... + 106789.

It is an arithmetic number, because the mean of its divisors is an integer number (170270100).

Almost surely, 2^3661000660 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 3661000660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4086482400).

3661000660 is an abundant number, since it is smaller than the sum of its proper divisors (4511964140).

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

3661000660 is a wasteful number, since it uses less digits than its factorization.

3661000660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43176 (or 43174 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 3661000660 is about 60506.2034836098. The cubic root of 3661000660 is about 1541.2269779697.

The spelling of 3661000660 in words is "three billion, six hundred sixty-one million, six hundred sixty", and thus it is an aban number.