3866705 has 4 divisors (see below), whose sum is σ = 4640052. Its totient is φ = 3093360.

The previous prime is 3866651. The next prime is 3866713. The reversal of 3866705 is 5076683.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1577536 + 2289169 = 1256^2 + 1513^2 .

It is not a de Polignac number, because 3866705 - 2¹² = 3862609 is a prime.

It is a Duffinian 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, 386666 + ... + 386675.

It is an arithmetic number, because the mean of its divisors is an integer number (1160013).

Almost surely, 2^3866705 is an apocalyptic number.

It is an amenable number.

3866705 is a deficient number, since it is larger than the sum of its proper divisors (773347).

3866705 is an equidigital number, since it uses as much as digits as its factorization.

3866705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773346.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 3866705 is about 1966.3939076391. The cubic root of 3866705 is about 156.9568761975.

The spelling of 3866705 in words is "three million, eight hundred sixty-six thousand, seven hundred five".