16661337419 has 4 divisors (see below), whose sum is σ = 16934474160. Its totient is φ = 16388200680.

The previous prime is 16661337401. The next prime is 16661337431. The reversal of 16661337419 is 91473316661.

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 16661337419 - 2¹² = 16661333323 is a prime.

It is a super-2 number, since 2×16661337419² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16661337439) 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, 136568279 + ... + 136568400.

It is an arithmetic number, because the mean of its divisors is an integer number (4233618540).

Almost surely, 2^16661337419 is an apocalyptic number.

16661337419 is a deficient number, since it is larger than the sum of its proper divisors (273136741).

16661337419 is an equidigital number, since it uses as much as digits as its factorization.

16661337419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273136740.

The product of its digits is 489888, while the sum is 47.

The spelling of 16661337419 in words is "sixteen billion, six hundred sixty-one million, three hundred thirty-seven thousand, four hundred nineteen".