6661138 has 8 divisors (see below), whose sum is σ = 10900080. Its totient is φ = 3027780.

The previous prime is 6661117. The next prime is 6661141. The reversal of 6661138 is 8311666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151368 + ... + 151411.

It is an arithmetic number, because the mean of its divisors is an integer number (1362510).

Almost surely, 2^6661138 is an apocalyptic number.

6661138 is a deficient number, since it is larger than the sum of its proper divisors (4238942).

6661138 is a wasteful number, since it uses less digits than its factorization.

6661138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302792.

The product of its digits is 5184, while the sum is 31.

The square root of 6661138 is about 2580.9180537165. The cubic root of 6661138 is about 188.1551646424.

The spelling of 6661138 in words is "six million, six hundred sixty-one thousand, one hundred thirty-eight".