3666987 has 12 divisors (see below), whose sum is σ = 5410080. Its totient is φ = 2392368.

The previous prime is 3666979. The next prime is 3666991. The reversal of 3666987 is 7896663.

It is not a de Polignac number, because 3666987 - 2³ = 3666979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3666907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3912 + ... + 4757.

It is an arithmetic number, because the mean of its divisors is an integer number (450840).

Almost surely, 2^3666987 is an apocalyptic number.

3666987 is a deficient number, since it is larger than the sum of its proper divisors (1743093).

3666987 is a wasteful number, since it uses less digits than its factorization.

3666987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8722 (or 8719 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 3666987 is about 1914.9378579996. The cubic root of 3666987 is about 154.2066573960.

The spelling of 3666987 in words is "three million, six hundred sixty-six thousand, nine hundred eighty-seven".