3926666 has 4 divisors (see below), whose sum is σ = 5890002. Its totient is φ = 1963332.

The previous prime is 3926651. The next prime is 3926707. The reversal of 3926666 is 6666293.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6666293 = 389 ⋅17137.

It can be written as a sum of positive squares in only one way, i.e., 3783025 + 143641 = 1945^2 + 379^2 .

3926666 is a modest number, since divided by 6666 gives 392 as remainder.

It is a Curzon number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 981665 + ... + 981668.

Almost surely, 2^3926666 is an apocalyptic number.

3926666 is a deficient number, since it is larger than the sum of its proper divisors (1963336).

3926666 is a wasteful number, since it uses less digits than its factorization.

3926666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1963335.

The product of its digits is 69984, while the sum is 38.

The square root of 3926666 is about 1981.5816914778. The cubic root of 3926666 is about 157.7640284624.

The spelling of 3926666 in words is "three million, nine hundred twenty-six thousand, six hundred sixty-six".