1666151314 has 4 divisors (see below), whose sum is σ = 2499226974. Its totient is φ = 833075656.

The previous prime is 1666151309. The next prime is 1666151323. The reversal of 1666151314 is 4131516661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4131516661 = 31 ⋅133274731.

It can be written as a sum of positive squares in only one way, i.e., 852932025 + 813219289 = 29205^2 + 28517^2 .

It is a super-2 number, since 2×1666151314² = 5552120402287853192, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1666151314.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 416537827 + ... + 416537830.

Almost surely, 2^1666151314 is an apocalyptic number.

1666151314 is a deficient number, since it is larger than the sum of its proper divisors (833075660).

1666151314 is an equidigital number, since it uses as much as digits as its factorization.

1666151314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833075659.

The product of its digits is 12960, while the sum is 34.

The square root of 1666151314 is about 40818.5168030393. The cubic root of 1666151314 is about 1185.5088852690.

Adding to 1666151314 its reverse (4131516661), we get a palindrome (5797667975).

The spelling of 1666151314 in words is "one billion, six hundred sixty-six million, one hundred fifty-one thousand, three hundred fourteen".