2003668685 has 4 divisors (see below), whose sum is σ = 2404402428. Its totient is φ = 1602934944.

The previous prime is 2003668673. The next prime is 2003668691. The reversal of 2003668685 is 5868663002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 713637796 + 1290030889 = 26714^2 + 35917^2 .

It is a cyclic number.

It is not a de Polignac number, because 2003668685 - 2⁴ = 2003668669 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200366864 + ... + 200366873.

It is an arithmetic number, because the mean of its divisors is an integer number (601100607).

Almost surely, 2^2003668685 is an apocalyptic number.

It is an amenable number.

2003668685 is a deficient number, since it is larger than the sum of its proper divisors (400733743).

2003668685 is an equidigital number, since it uses as much as digits as its factorization.

2003668685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400733742.

The product of its (nonzero) digits is 414720, while the sum is 44.

The square root of 2003668685 is about 44762.3579025949. The cubic root of 2003668685 is about 1260.6909549063.

The spelling of 2003668685 in words is "two billion, three million, six hundred sixty-eight thousand, six hundred eighty-five".