1966240219 has 2 divisors, whose sum is σ = 1966240220. Its totient is φ = 1966240218.

The previous prime is 1966240217. The next prime is 1966240277. The reversal of 1966240219 is 9120426691.

It is a weak prime.

It is an emirp because it is prime and its reverse (9120426691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1966240219 - 2¹ = 1966240217 is a prime.

It is a super-2 number, since 2×1966240219² = 7732201197626335922, which contains 22 as substring.

Together with 1966240217, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1966240217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 983120109 + 983120110.

It is an arithmetic number, because the mean of its divisors is an integer number (983120110).

Almost surely, 2^1966240219 is an apocalyptic number.

1966240219 is a deficient number, since it is larger than the sum of its proper divisors (1).

1966240219 is an equidigital number, since it uses as much as digits as its factorization.

1966240219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 1966240219 is about 44342.3073260740. The cubic root of 1966240219 is about 1252.7916739903.

The spelling of 1966240219 in words is "one billion, nine hundred sixty-six million, two hundred forty thousand, two hundred nineteen".