1668365424 has 150 divisors (see below), whose sum is σ = 5308115120. Its totient is φ = 505517760.

The previous prime is 1668365423. The next prime is 1668365437. The reversal of 1668365424 is 4245638661.

1668365424 is a `hidden beast` number, since 16 + 68 + 36 + 542 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1668365424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668365423) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 151497 + ... + 162135.

Almost surely, 2^1668365424 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 1668365424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2654057560).

1668365424 is an abundant number, since it is smaller than the sum of its proper divisors (3639749696).

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

1668365424 is a wasteful number, since it uses less digits than its factorization.

1668365424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10681 (or 10655 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The square root of 1668365424 is about 40845.6291908939. The cubic root of 1668365424 is about 1186.0337846211.

The spelling of 1668365424 in words is "one billion, six hundred sixty-eight million, three hundred sixty-five thousand, four hundred twenty-four".