1666163519 has 8 divisors (see below), whose sum is σ = 1684250400. Its totient is φ = 1648174176.

The previous prime is 1666163501. The next prime is 1666163533. The reversal of 1666163519 is 9153616661.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1666163519 - 2¹² = 1666159423 is a prime.

It is a super-2 number, since 2×1666163519² = 5552201744092926722, 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 1666163519.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666163549) 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 7 ways as a sum of consecutive naturals, for example, 10229 + ... + 58625.

It is an arithmetic number, because the mean of its divisors is an integer number (210531300).

Almost surely, 2^1666163519 is an apocalyptic number.

1666163519 is a deficient number, since it is larger than the sum of its proper divisors (18086881).

1666163519 is a wasteful number, since it uses less digits than its factorization.

1666163519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48769.

The product of its digits is 174960, while the sum is 44.

The square root of 1666163519 is about 40818.6663059929. Note that the first 3 decimals coincide. The cubic root of 1666163519 is about 1185.5117799842.

The spelling of 1666163519 in words is "one billion, six hundred sixty-six million, one hundred sixty-three thousand, five hundred nineteen".