1668276 has 60 divisors (see below), whose sum is σ = 4607680. Its totient is φ = 524880.

The previous prime is 1668253. The next prime is 1668299. The reversal of 1668276 is 6728661.

1668276 = 25³ + 26³ + ... + 51³.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1668253) and next prime (1668299).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1668276.

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 19 ways as a sum of consecutive naturals, for example, 6021 + ... + 6291.

2^1668276 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1668276, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2303840).

1668276 is an abundant number, since it is smaller than the sum of its proper divisors (2939404).

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

1668276 is a wasteful number, since it uses less digits than its factorization.

1668276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306 (or 295 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 1668276 is about 1291.6175904655. The cubic root of 1668276 is about 118.6012593864.

The spelling of 1668276 in words is "one million, six hundred sixty-eight thousand, two hundred seventy-six".