1664160673 has 32 divisors (see below), whose sum is σ = 1990517760. Its totient is φ = 1361828160.

The previous prime is 1664160647. The next prime is 1664160683. The reversal of 1664160673 is 3760614661.

It is not a de Polignac number, because 1664160673 - 2²¹ = 1662063521 is a prime.

It is a super-3 number, since 3×1664160673³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1664160613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3609663 + ... + 3610123.

It is an arithmetic number, because the mean of its divisors is an integer number (62203680).

Almost surely, 2^1664160673 is an apocalyptic number.

It is an amenable number.

1664160673 is a deficient number, since it is larger than the sum of its proper divisors (326357087).

1664160673 is a wasteful number, since it uses less digits than its factorization.

1664160673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 1664160673 is about 40794.1254716902. The cubic root of 1664160673 is about 1185.0365666106.

The spelling of 1664160673 in words is "one billion, six hundred sixty-four million, one hundred sixty thousand, six hundred seventy-three".