3666705 has 32 divisors (see below), whose sum is σ = 6856704. Its totient is φ = 1638336.

The previous prime is 3666703. The next prime is 3666727. The reversal of 3666705 is 5076663.

It is not a de Polignac number, because 3666705 - 2¹ = 3666703 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3666703) 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 31 ways as a sum of consecutive naturals, for example, 4564 + ... + 5306.

It is an arithmetic number, because the mean of its divisors is an integer number (214272).

Almost surely, 2^3666705 is an apocalyptic number.

3666705 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3666705 is a deficient number, since it is larger than the sum of its proper divisors (3189999).

3666705 is a wasteful number, since it uses less digits than its factorization.

3666705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805.

The product of its (nonzero) digits is 22680, while the sum is 33.

The square root of 3666705 is about 1914.8642249517. The cubic root of 3666705 is about 154.2027043421.

It can be divided in two parts, 3666 and 705, that added together give a triangular number (4371 = T₉₃).

The spelling of 3666705 in words is "three million, six hundred sixty-six thousand, seven hundred five".