1666634 has 8 divisors (see below), whose sum is σ = 2511648. Its totient is φ = 829420.

The previous prime is 1666627. The next prime is 1666657. The reversal of 1666634 is 4366661.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1666634.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1382 + ... + 2289.

It is an arithmetic number, because the mean of its divisors is an integer number (313956).

2^1666634 is an apocalyptic number.

1666634 is a deficient number, since it is larger than the sum of its proper divisors (845014).

1666634 is a wasteful number, since it uses less digits than its factorization.

1666634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3900.

The product of its digits is 15552, while the sum is 32.

The square root of 1666634 is about 1290.9817969282. The cubic root of 1666634 is about 118.5623355323.

The spelling of 1666634 in words is "one million, six hundred sixty-six thousand, six hundred thirty-four".