3687666 has 8 divisors (see below), whose sum is σ = 7375344. Its totient is φ = 1229220.

The previous prime is 3687631. The next prime is 3687683. The reversal of 3687666 is 6667863.

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

3687666 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 307300 + ... + 307311.

It is an arithmetic number, because the mean of its divisors is an integer number (921918).

Almost surely, 2^3687666 is an apocalyptic number.

3687666 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.

3687666 is a wasteful number, since it uses less digits than its factorization.

3687666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614616.

The product of its digits is 217728, while the sum is 42.

The square root of 3687666 is about 1920.3296591992. The cubic root of 3687666 is about 154.4959833897.

It can be divided in two parts, 3687 and 666, that multiplied together give a palindrome (2455542).

The spelling of 3687666 in words is "three million, six hundred eighty-seven thousand, six hundred sixty-six".