3870666 has 20 divisors (see below), whose sum is σ = 8673522. Its totient is φ = 1290168.

The previous prime is 3870653. The next prime is 3870667. The reversal of 3870666 is 6660783.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2480625 + 1390041 = 1575^2 + 1179^2 .

It is a d-powerful number, because it can be written as 3⁵ + 8⁷ + 7³ + 0 + 6⁶ + 6⁶ + 6⁸ .

It is a self number, because there is not a number n which added to its sum of digits gives 3870666.

It is not an unprimeable number, because it can be changed into a prime (3870667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 11785 + ... + 12108.

Almost surely, 2^3870666 is an apocalyptic number.

3870666 is an abundant number, since it is smaller than the sum of its proper divisors (4802856).

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

3870666 is a wasteful number, since it uses less digits than its factorization.

3870666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23907 (or 23898 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 3870666 is about 1967.4008234216. The cubic root of 3870666 is about 157.0104527369.

The spelling of 3870666 in words is "three million, eight hundred seventy thousand, six hundred sixty-six".