1664113505 has 16 divisors (see below), whose sum is σ = 2028595584. Its totient is φ = 1310221440.

The previous prime is 1664113447. The next prime is 1664113513. The reversal of 1664113505 is 5053114661.

It is not a de Polignac number, because 1664113505 - 2⁶ = 1664113441 is a prime.

It is a Duffinian number.

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, 612029 + ... + 614741.

It is an arithmetic number, because the mean of its divisors is an integer number (126787224).

Almost surely, 2^1664113505 is an apocalyptic number.

It is an amenable number.

1664113505 is a deficient number, since it is larger than the sum of its proper divisors (364482079).

1664113505 is a wasteful number, since it uses less digits than its factorization.

1664113505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4616.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 1664113505 is about 40793.5473451378. The cubic root of 1664113505 is about 1185.0253705097.

The spelling of 1664113505 in words is "one billion, six hundred sixty-four million, one hundred thirteen thousand, five hundred five".