1666484 has 6 divisors (see below), whose sum is σ = 2916354. Its totient is φ = 833240.

The previous prime is 1666481. The next prime is 1666487. The reversal of 1666484 is 4846661.

It is an interprime number because it is at equal distance from previous prime (1666481) and next prime (1666487).

It can be written as a sum of positive squares in only one way, i.e., 1488400 + 178084 = 1220^2 + 422^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 208307 + ... + 208314.

It is an arithmetic number, because the mean of its divisors is an integer number (486059).

2^1666484 is an apocalyptic number.

It is an amenable number.

1666484 is a deficient number, since it is larger than the sum of its proper divisors (1249870).

1666484 is a wasteful number, since it uses less digits than its factorization.

1666484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416625 (or 416623 counting only the distinct ones).

The product of its digits is 27648, while the sum is 35.

The square root of 1666484 is about 1290.9237003015. The cubic root of 1666484 is about 118.5587784858.

The spelling of 1666484 in words is "one million, six hundred sixty-six thousand, four hundred eighty-four".