1668425503 has 4 divisors (see below), whose sum is σ = 1668507768. Its totient is φ = 1668343240.

The previous prime is 1668425501. The next prime is 1668425513. The reversal of 1668425503 is 3055248661.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1668425503 - 2¹ = 1668425501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668425501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13308 + ... + 59278.

It is an arithmetic number, because the mean of its divisors is an integer number (417126942).

Almost surely, 2^1668425503 is an apocalyptic number.

1668425503 is a deficient number, since it is larger than the sum of its proper divisors (82265).

1668425503 is an equidigital number, since it uses as much as digits as its factorization.

1668425503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82264.

The product of its (nonzero) digits is 172800, while the sum is 40.

The square root of 1668425503 is about 40846.3646240397. The cubic root of 1668425503 is about 1186.0480210842.

The spelling of 1668425503 in words is "one billion, six hundred sixty-eight million, four hundred twenty-five thousand, five hundred three".