16665650451003 has 4 divisors (see below), whose sum is σ = 22220867268008. Its totient is φ = 11110433634000.

The previous prime is 16665650450971. The next prime is 16665650451017. The reversal of 16665650451003 is 30015405656661.

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

It is not a de Polignac number, because 16665650451003 - 2⁵ = 16665650450971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16665650450003) 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, 2777608408498 + ... + 2777608408503.

It is an arithmetic number, because the mean of its divisors is an integer number (5555216817002).

Almost surely, 2^{16665650451003} is an apocalyptic number.

16665650451003 is a deficient number, since it is larger than the sum of its proper divisors (5555216817005).

16665650451003 is an equidigital number, since it uses as much as digits as its factorization.

16665650451003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5555216817004.

The product of its (nonzero) digits is 1944000, while the sum is 48.

The spelling of 16665650451003 in words is "sixteen trillion, six hundred sixty-five billion, six hundred fifty million, four hundred fifty-one thousand, three".