2660666003 has 4 divisors (see below), whose sum is σ = 2661376080. Its totient is φ = 2659955928.

The previous prime is 2660665991. The next prime is 2660666051. The reversal of 2660666003 is 3006660662.

It is a happy number.

2660666003 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 2660666003 - 2²⁰ = 2659617427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2660666093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 349388 + ... + 356921.

It is an arithmetic number, because the mean of its divisors is an integer number (665344020).

Almost surely, 2^2660666003 is an apocalyptic number.

2660666003 is a deficient number, since it is larger than the sum of its proper divisors (710077).

2660666003 is an equidigital number, since it uses as much as digits as its factorization.

2660666003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710076.

The product of its (nonzero) digits is 46656, while the sum is 35.

The square root of 2660666003 is about 51581.6440509606. The cubic root of 2660666003 is about 1385.6816105687.

The spelling of 2660666003 in words is "two billion, six hundred sixty million, six hundred sixty-six thousand, three".