6139666 has 16 divisors (see below), whose sum is σ = 10350144. Its totient is φ = 2710224.

The previous prime is 6139663. The next prime is 6139673. The reversal of 6139666 is 6669316.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6139663) 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 7 ways as a sum of consecutive naturals, for example, 4536 + ... + 5731.

It is an arithmetic number, because the mean of its divisors is an integer number (646884).

Almost surely, 2^6139666 is an apocalyptic number.

6139666 is a deficient number, since it is larger than the sum of its proper divisors (4210478).

6139666 is a wasteful number, since it uses less digits than its factorization.

6139666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10305.

The product of its digits is 34992, while the sum is 37.

The square root of 6139666 is about 2477.8349420411. The cubic root of 6139666 is about 183.1112027796. Note that the first 3 decimals are identical.

The spelling of 6139666 in words is "six million, one hundred thirty-nine thousand, six hundred sixty-six".