16660100503 has 4 divisors (see below), whose sum is σ = 16665141640. Its totient is φ = 16655059368.

The previous prime is 16660100491. The next prime is 16660100551. The reversal of 16660100503 is 30500106661.

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 16660100503 - 2¹³ = 16660092311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16660100203) 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, 2515608 + ... + 2522221.

It is an arithmetic number, because the mean of its divisors is an integer number (4166285410).

Almost surely, 2^16660100503 is an apocalyptic number.

16660100503 is a deficient number, since it is larger than the sum of its proper divisors (5041137).

16660100503 is an equidigital number, since it uses as much as digits as its factorization.

16660100503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5041136.

The product of its (nonzero) digits is 3240, while the sum is 28.

The spelling of 16660100503 in words is "sixteen billion, six hundred sixty million, one hundred thousand, five hundred three".