1664710165 has 8 divisors (see below), whose sum is σ = 2003097600. Its totient is φ = 1328137872.

The previous prime is 1664710163. The next prime is 1664710181. The reversal of 1664710165 is 5610174661.

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 1664710165 - 2¹ = 1664710163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664710163) 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, 451765 + ... + 455434.

It is an arithmetic number, because the mean of its divisors is an integer number (250387200).

Almost surely, 2^1664710165 is an apocalyptic number.

It is an amenable number.

1664710165 is a deficient number, since it is larger than the sum of its proper divisors (338387435).

1664710165 is an equidigital number, since it uses as much as digits as its factorization.

1664710165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907571.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 1664710165 is about 40800.8598561354. The cubic root of 1664710165 is about 1185.1669819939.

The spelling of 1664710165 in words is "one billion, six hundred sixty-four million, seven hundred ten thousand, one hundred sixty-five".