1666546 has 8 divisors (see below), whose sum is σ = 2856960. Its totient is φ = 714228.

The previous prime is 1666541. The next prime is 1666559. The reversal of 1666546 is 6456661.

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

It is not an unprimeable number, because it can be changed into a prime (1666541) 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 3 ways as a sum of consecutive naturals, for example, 59506 + ... + 59533.

It is an arithmetic number, because the mean of its divisors is an integer number (357120).

2^1666546 is an apocalyptic number.

1666546 is a deficient number, since it is larger than the sum of its proper divisors (1190414).

1666546 is a wasteful number, since it uses less digits than its factorization.

1666546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119048.

The product of its digits is 25920, while the sum is 34.

The square root of 1666546 is about 1290.9477138908. The cubic root of 1666546 is about 118.5602487576.

The spelling of 1666546 in words is "one million, six hundred sixty-six thousand, five hundred forty-six".