4013666 has 16 divisors (see below), whose sum is σ = 6445656. Its totient is φ = 1867776.

The previous prime is 4013651. The next prime is 4013671. The reversal of 4013666 is 6663104.

It can be written as a sum of positive squares in 4 ways, for example, as 3530641 + 483025 = 1879^2 + 695^2 .

It is a super-2 number, since 2×4013666² = 32219029519112, which contains 22 as substring.

It is a congruent 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 in 7 ways as a sum of consecutive naturals, for example, 2690 + ... + 3906.

Almost surely, 2^4013666 is an apocalyptic number.

4013666 is a deficient number, since it is larger than the sum of its proper divisors (2431990).

4013666 is a wasteful number, since it uses less digits than its factorization.

4013666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 4013666 is about 2003.4135868562. The cubic root of 4013666 is about 158.9206782332.

The spelling of 4013666 in words is "four million, thirteen thousand, six hundred sixty-six".