16700221867 has 4 divisors (see below), whose sum is σ = 19085967856. Its totient is φ = 14314475880.

The previous prime is 16700221841. The next prime is 16700221873. The reversal of 16700221867 is 76812200761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76812200761 = 30593 ⋅2510777.

It is a cyclic number.

It is not a de Polignac number, because 16700221867 - 2⁷ = 16700221739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16700221807) 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 3 ways as a sum of consecutive naturals, for example, 1192872984 + ... + 1192872997.

It is an arithmetic number, because the mean of its divisors is an integer number (4771491964).

Almost surely, 2^16700221867 is an apocalyptic number.

16700221867 is a deficient number, since it is larger than the sum of its proper divisors (2385745989).

16700221867 is an equidigital number, since it uses as much as digits as its factorization.

16700221867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2385745988.

The product of its (nonzero) digits is 56448, while the sum is 40.

The spelling of 16700221867 in words is "sixteen billion, seven hundred million, two hundred twenty-one thousand, eight hundred sixty-seven".