3660651440 has 80 divisors (see below), whose sum is σ = 8916393600. Its totient is φ = 1395803136.

The previous prime is 3660651437. The next prime is 3660651443. The reversal of 3660651440 is 441560663.

It is an interprime number because it is at equal distance from previous prime (3660651437) and next prime (3660651443).

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 3660651440.

It is not an unprimeable number, because it can be changed into a prime (3660651443) 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, 173294 + ... + 193266.

It is an arithmetic number, because the mean of its divisors is an integer number (111454920).

Almost surely, 2^3660651440 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 3660651440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4458196800).

3660651440 is an abundant number, since it is smaller than the sum of its proper divisors (5255742160).

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

3660651440 is a wasteful number, since it uses less digits than its factorization.

3660651440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20094 (or 20088 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 3660651440 is about 60503.3175949881. The cubic root of 3660651440 is about 1541.1779709313.

The spelling of 3660651440 in words is "three billion, six hundred sixty million, six hundred fifty-one thousand, four hundred forty".