3661791320 has 32 divisors (see below), whose sum is σ = 8988034320. Its totient is φ = 1331560320.

The previous prime is 3661791319. The next prime is 3661791361. The reversal of 3661791320 is 231971663.

It is a happy number.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4160687 + ... + 4161566.

Almost surely, 2^3661791320 is an apocalyptic number.

It is an amenable number.

3661791320 is an abundant number, since it is smaller than the sum of its proper divisors (5326243000).

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

3661791320 is a wasteful number, since it uses less digits than its factorization.

3661791320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8322275 (or 8322271 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 3661791320 is about 60512.7368410982. The cubic root of 3661791320 is about 1541.3379220276.

The spelling of 3661791320 in words is "three billion, six hundred sixty-one million, seven hundred ninety-one thousand, three hundred twenty".