1664706080 has 48 divisors (see below), whose sum is σ = 3962939904. Its totient is φ = 660791040.

The previous prime is 1664706077. The next prime is 1664706083. The reversal of 1664706080 is 806074661.

It is an interprime number because it is at equal distance from previous prime (1664706077) and next prime (1664706083).

It is not an unprimeable number, because it can be changed into a prime (1664706083) 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 7 ways as a sum of consecutive naturals, for example, 18752 + ... + 60671.

It is an arithmetic number, because the mean of its divisors is an integer number (82561248).

Almost surely, 2^1664706080 is an apocalyptic number.

1664706080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1664706080 is an abundant number, since it is smaller than the sum of its proper divisors (2298233824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1664706080 is a wasteful number, since it uses less digits than its factorization.

1664706080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79569 (or 79561 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 1664706080 is about 40800.8097958852. The cubic root of 1664706080 is about 1185.1660125737.

The spelling of 1664706080 in words is "one billion, six hundred sixty-four million, seven hundred six thousand, eighty".