1666038 has 16 divisors (see below), whose sum is σ = 3635136. Its totient is φ = 504840.

The previous prime is 1666037. The next prime is 1666039. The reversal of 1666038 is 8306661.

It is an interprime number because it is at equal distance from previous prime (1666037) and next prime (1666039).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1665996 and 1666014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12556 + ... + 12687.

It is an arithmetic number, because the mean of its divisors is an integer number (227196).

2^1666038 is an apocalyptic number.

1666038 is an abundant number, since it is smaller than the sum of its proper divisors (1969098).

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

1666038 is a wasteful number, since it uses less digits than its factorization.

1666038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25259.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 1666038 is about 1290.7509442181. The cubic root of 1666038 is about 118.5482009399.

The spelling of 1666038 in words is "one million, six hundred sixty-six thousand, thirty-eight".