1668552 has 32 divisors (see below), whose sum is σ = 4286400. Its totient is φ = 540864.

The previous prime is 1668551. The next prime is 1668553. The reversal of 1668552 is 2558661.

It is an interprime number because it is at equal distance from previous prime (1668551) and next prime (1668553).

It is not an unprimeable number, because it can be changed into a prime (1668551) by changing a digit.

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, 52 + ... + 1827.

It is an arithmetic number, because the mean of its divisors is an integer number (133950).

2^1668552 is an apocalyptic number.

1668552 is a gapful number since it is divisible by the number (12) 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 1668552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2143200).

1668552 is an abundant number, since it is smaller than the sum of its proper divisors (2617848).

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

1668552 is a wasteful number, since it uses less digits than its factorization.

1668552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1925 (or 1921 counting only the distinct ones).

The product of its digits is 14400, while the sum is 33.

The square root of 1668552 is about 1291.7244288160. The cubic root of 1668552 is about 118.6077994998.

The spelling of 1668552 in words is "one million, six hundred sixty-eight thousand, five hundred fifty-two".