1666924 has 24 divisors (see below), whose sum is σ = 3426080. Its totient is φ = 694656.

The previous prime is 1666919. The next prime is 1666933. The reversal of 1666924 is 4296661.

It is a self number, because there is not a number n which added to its sum of digits gives 1666924.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 232 + ... + 1840.

2^1666924 is an apocalyptic number.

1666924 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1666924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1713040).

1666924 is an abundant number, since it is smaller than the sum of its proper divisors (1759156).

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

1666924 is a wasteful number, since it uses less digits than its factorization.

1666924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1657 (or 1655 counting only the distinct ones).

The product of its digits is 15552, while the sum is 34.

The square root of 1666924 is about 1291.0941096605. The cubic root of 1666924 is about 118.5692118837.

The spelling of 1666924 in words is "one million, six hundred sixty-six thousand, nine hundred twenty-four".