1668634 has 16 divisors (see below), whose sum is σ = 2770560. Its totient is φ = 747360.

The previous prime is 1668629. The next prime is 1668647. The reversal of 1668634 is 4368661.

It is a self number, because there is not a number n which added to its sum of digits gives 1668634.

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 7 ways as a sum of consecutive naturals, for example, 1087 + ... + 2125.

It is an arithmetic number, because the mean of its divisors is an integer number (173160).

2^1668634 is an apocalyptic number.

1668634 is a deficient number, since it is larger than the sum of its proper divisors (1101926).

1668634 is a wasteful number, since it uses less digits than its factorization.

1668634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1125.

The product of its digits is 20736, while the sum is 34.

The square root of 1668634 is about 1291.7561689421. The cubic root of 1668634 is about 118.6097424380.

The spelling of 1668634 in words is "one million, six hundred sixty-eight thousand, six hundred thirty-four".