3781660 has 24 divisors (see below), whose sum is σ = 8287776. Its totient is φ = 1446720.

The previous prime is 3781649. The next prime is 3781663. The reversal of 3781660 is 661873.

3781660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3781663) by changing a digit.

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, 3651 + ... + 4570.

It is an arithmetic number, because the mean of its divisors is an integer number (345324).

Almost surely, 2^3781660 is an apocalyptic number.

It is an amenable number.

3781660 is an abundant number, since it is smaller than the sum of its proper divisors (4506116).

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

3781660 is a wasteful number, since it uses less digits than its factorization.

3781660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8253 (or 8251 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 3781660 is about 1944.6490685982. The cubic root of 3781660 is about 155.7976227348.

The spelling of 3781660 in words is "three million, seven hundred eighty-one thousand, six hundred sixty".