1665000159 has 4 divisors (see below), whose sum is σ = 2220000216. Its totient is φ = 1110000104.

The previous prime is 1665000157. The next prime is 1665000263. The reversal of 1665000159 is 9510005661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1665000159 - 2¹ = 1665000157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665000157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277500024 + ... + 277500029.

It is an arithmetic number, because the mean of its divisors is an integer number (555000054).

Almost surely, 2^1665000159 is an apocalyptic number.

1665000159 is a deficient number, since it is larger than the sum of its proper divisors (555000057).

1665000159 is an equidigital number, since it uses as much as digits as its factorization.

1665000159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555000056.

The product of its (nonzero) digits is 8100, while the sum is 33.

The square root of 1665000159 is about 40804.4134745250. The cubic root of 1665000159 is about 1185.2357970477.

The spelling of 1665000159 in words is "one billion, six hundred sixty-five million, one hundred fifty-nine", and thus it is an aban number.