3618666 has 12 divisors (see below), whose sum is σ = 7840482. Its totient is φ = 1206216.

The previous prime is 3618653. The next prime is 3618679. The reversal of 3618666 is 6668163.

It is an interprime number because it is at equal distance from previous prime (3618653) and next prime (3618679).

It can be written as a sum of positive squares in only one way, i.e., 3515625 + 103041 = 1875^2 + 321^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3618666.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100501 + ... + 100536.

Almost surely, 2^3618666 is an apocalyptic number.

3618666 is an abundant number, since it is smaller than the sum of its proper divisors (4221816).

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

3618666 is a wasteful number, since it uses less digits than its factorization.

3618666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201045 (or 201042 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 3618666 is about 1902.2791593244. The cubic root of 3618666 is about 153.5263176059.

The spelling of 3618666 in words is "three million, six hundred eighteen thousand, six hundred sixty-six".