4138666 has 16 divisors (see below), whose sum is σ = 7403904. Its totient is φ = 1696464.

The previous prime is 4138649. The next prime is 4138681. The reversal of 4138666 is 6668314.

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, 6105 + ... + 6748.

It is an arithmetic number, because the mean of its divisors is an integer number (462744).

Almost surely, 2^4138666 is an apocalyptic number.

4138666 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

4138666 is a deficient number, since it is larger than the sum of its proper divisors (3265238).

4138666 is a wasteful number, since it uses less digits than its factorization.

4138666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12885.

The product of its digits is 20736, while the sum is 34.

The square root of 4138666 is about 2034.3711559103. The cubic root of 4138666 is about 160.5536290087.

The spelling of 4138666 in words is "four million, one hundred thirty-eight thousand, six hundred sixty-six".