3666738 has 16 divisors (see below), whose sum is σ = 7367040. Its totient is φ = 1216656.

The previous prime is 3666727. The next prime is 3666743. The reversal of 3666738 is 8376663.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 3666696 and 3666705.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156 + ... + 2712.

It is an arithmetic number, because the mean of its divisors is an integer number (460440).

Almost surely, 2^3666738 is an apocalyptic number.

3666738 is an abundant number, since it is smaller than the sum of its proper divisors (3700302).

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

3666738 is a wasteful number, since it uses less digits than its factorization.

3666738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2801.

The product of its digits is 108864, while the sum is 39.

The square root of 3666738 is about 1914.8728417313. The cubic root of 3666738 is about 154.2031669440.

The spelling of 3666738 in words is "three million, six hundred sixty-six thousand, seven hundred thirty-eight".