3765666 has 8 divisors (see below), whose sum is σ = 7531344. Its totient is φ = 1255220.

The previous prime is 3765661. The next prime is 3765673. The reversal of 3765666 is 6665673.

It is a sphenic number, since it is the product of 3 distinct primes.

3765666 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (3765661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 313800 + ... + 313811.

It is an arithmetic number, because the mean of its divisors is an integer number (941418).

Almost surely, 2^3765666 is an apocalyptic number.

3765666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

3765666 is a wasteful number, since it uses less digits than its factorization.

3765666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627616.

The product of its digits is 136080, while the sum is 39.

The square root of 3765666 is about 1940.5324011724. The cubic root of 3765666 is about 155.5776709676.

It can be divided in two parts, 37 and 65666, that added together give a triangular number (65703 = T₃₆₂).

The spelling of 3765666 in words is "three million, seven hundred sixty-five thousand, six hundred sixty-six".