2000661003 has 48 divisors (see below), whose sum is σ = 3378675456. Its totient is φ = 1128409920.

The previous prime is 2000661001. The next prime is 2000661029. The reversal of 2000661003 is 3001660002.

It is a happy number.

2000661003 is a `hidden beast` number, since 2 + 0 + 0 + 0 + 661 + 0 + 0 + 3 = 666.

It is not a de Polignac number, because 2000661003 - 2¹ = 2000661001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2000661001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 72376 + ... + 96122.

It is an arithmetic number, because the mean of its divisors is an integer number (70389072).

Almost surely, 2^2000661003 is an apocalyptic number.

2000661003 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2000661003 is a deficient number, since it is larger than the sum of its proper divisors (1378014453).

2000661003 is a wasteful number, since it uses less digits than its factorization.

2000661003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23824 (or 23821 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 2000661003 is about 44728.7491776821. The cubic root of 2000661003 is about 1260.0598365386.

The spelling of 2000661003 in words is "two billion, six hundred sixty-one thousand, three".