1664310305 has 16 divisors (see below), whose sum is σ = 2283746304. Its totient is φ = 1140609600.

The previous prime is 1664310287. The next prime is 1664310407. The reversal of 1664310305 is 5030134661.

It is a happy number.

It is not a de Polignac number, because 1664310305 - 2⁸ = 1664310049 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56099 + ... + 80471.

It is an arithmetic number, because the mean of its divisors is an integer number (142734144).

Almost surely, 2^1664310305 is an apocalyptic number.

It is an amenable number.

1664310305 is a deficient number, since it is larger than the sum of its proper divisors (619435999).

1664310305 is a wasteful number, since it uses less digits than its factorization.

1664310305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26336.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 1664310305 is about 40795.9594200210. The cubic root of 1664310305 is about 1185.0720828282.

Adding to 1664310305 its reverse (5030134661), we get a palindrome (6694444966).

The spelling of 1664310305 in words is "one billion, six hundred sixty-four million, three hundred ten thousand, three hundred five".