1668159249 has 8 divisors (see below), whose sum is σ = 2320917312. Its totient is φ = 1063753680.

The previous prime is 1668159239. The next prime is 1668159299. The reversal of 1668159249 is 9429518661.

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

It is not a de Polignac number, because 1668159249 - 2¹³ = 1668151057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1668159239) 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, 12088042 + ... + 12088179.

It is an arithmetic number, because the mean of its divisors is an integer number (290114664).

Almost surely, 2^1668159249 is an apocalyptic number.

It is an amenable number.

1668159249 is a deficient number, since it is larger than the sum of its proper divisors (652758063).

1668159249 is a wasteful number, since it uses less digits than its factorization.

1668159249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24176247.

The product of its digits is 933120, while the sum is 51.

The square root of 1668159249 is about 40843.1052810630. The cubic root of 1668159249 is about 1185.9849263024.

The spelling of 1668159249 in words is "one billion, six hundred sixty-eight million, one hundred fifty-nine thousand, two hundred forty-nine".