1668380219 has 8 divisors (see below), whose sum is σ = 1823987712. Its totient is φ = 1513428840.

The previous prime is 1668380167. The next prime is 1668380239. The reversal of 1668380219 is 9120838661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1668380219 is a prime.

It is a super-2 number, since 2×1668380219² = 5566985110300975922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1668380219.

It is not an unprimeable number, because it can be changed into a prime (1668380239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158699 + ... + 168884.

It is an arithmetic number, because the mean of its divisors is an integer number (227998464).

Almost surely, 2^1668380219 is an apocalyptic number.

1668380219 is a deficient number, since it is larger than the sum of its proper divisors (155607493).

1668380219 is a wasteful number, since it uses less digits than its factorization.

1668380219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328057.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 1668380219 is about 40845.8102992216. The cubic root of 1668380219 is about 1186.0372905113.

The spelling of 1668380219 in words is "one billion, six hundred sixty-eight million, three hundred eighty thousand, two hundred nineteen".