1668503685 has 8 divisors (see below), whose sum is σ = 2669605920. Its totient is φ = 889868624.

The previous prime is 1668503663. The next prime is 1668503689. The reversal of 1668503685 is 5863058661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1668503685 - 2¹² = 1668499589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668503689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55616775 + ... + 55616804.

It is an arithmetic number, because the mean of its divisors is an integer number (333700740).

Almost surely, 2^1668503685 is an apocalyptic number.

1668503685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1668503685 is a deficient number, since it is larger than the sum of its proper divisors (1001102235).

1668503685 is a wasteful number, since it uses less digits than its factorization.

1668503685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111233587.

The product of its (nonzero) digits is 1036800, while the sum is 48.

The square root of 1668503685 is about 40847.3216380218. The cubic root of 1668503685 is about 1186.0665467657.

The spelling of 1668503685 in words is "one billion, six hundred sixty-eight million, five hundred three thousand, six hundred eighty-five".