661114219 has 2 divisors, whose sum is σ = 661114220. Its totient is φ = 661114218.

The previous prime is 661114211. The next prime is 661114229. The reversal of 661114219 is 912411166.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 661114219 - 2³ = 661114211 is a prime.

It is a super-2 number, since 2×661114219² = 874144021127959922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (661114211) 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 as a sum of consecutive naturals, namely, 330557109 + 330557110.

It is an arithmetic number, because the mean of its divisors is an integer number (330557110).

Almost surely, 2^661114219 is an apocalyptic number.

661114219 is a deficient number, since it is larger than the sum of its proper divisors (1).

661114219 is an equidigital number, since it uses as much as digits as its factorization.

661114219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 31.

The square root of 661114219 is about 25712.1414705193. The cubic root of 661114219 is about 871.1484454512.

The spelling of 661114219 in words is "six hundred sixty-one million, one hundred fourteen thousand, two hundred nineteen".