1664909105 has 8 divisors (see below), whose sum is σ = 2103043200. Its totient is φ = 1261825776.

The previous prime is 1664909101. The next prime is 1664909137. The reversal of 1664909105 is 5019094661.

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 1664909105 - 2² = 1664909101 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1664909101) 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, 8762585 + ... + 8762774.

It is an arithmetic number, because the mean of its divisors is an integer number (262880400).

Almost surely, 2^1664909105 is an apocalyptic number.

It is an amenable number.

1664909105 is a deficient number, since it is larger than the sum of its proper divisors (438134095).

1664909105 is a wasteful number, since it uses less digits than its factorization.

1664909105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17525383.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 1664909105 is about 40803.2977221205. The cubic root of 1664909105 is about 1185.2141909582.

The spelling of 1664909105 in words is "one billion, six hundred sixty-four million, nine hundred nine thousand, one hundred five".