3666138 has 32 divisors (see below), whose sum is σ = 8588160. Its totient is φ = 1021440.

The previous prime is 3666127. The next prime is 3666139. The reversal of 3666138 is 8316663.

It is a junction number, because it is equal to n+sod(n) for n = 3666099 and 3666108.

It is not an unprimeable number, because it can be changed into a prime (3666139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 658 + ... + 2786.

It is an arithmetic number, because the mean of its divisors is an integer number (268380).

Almost surely, 2^3666138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3666138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4294080).

3666138 is an abundant number, since it is smaller than the sum of its proper divisors (4922022).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3666138 is a wasteful number, since it uses less digits than its factorization.

3666138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2182.

The product of its digits is 15552, while the sum is 33.

The square root of 3666138 is about 1914.7161669553. The cubic root of 3666138 is about 154.1947555669.

The spelling of 3666138 in words is "three million, six hundred sixty-six thousand, one hundred thirty-eight".