1664796744 has 96 divisors (see below), whose sum is σ = 4888228800. Its totient is φ = 508809600.

The previous prime is 1664796719. The next prime is 1664796761. The reversal of 1664796744 is 4476974661.

1664796744 is a `hidden beast` number, since 166 + 479 + 6 + 7 + 4 + 4 = 666.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 135447 + ... + 147225.

It is an arithmetic number, because the mean of its divisors is an integer number (50919050).

Almost surely, 2^1664796744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1664796744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2444114400).

1664796744 is an abundant number, since it is smaller than the sum of its proper divisors (3223432056).

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

1664796744 is a wasteful number, since it uses less digits than its factorization.

1664796744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11955 (or 11948 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 54.

The square root of 1664796744 is about 40801.9208371371. The cubic root of 1664796744 is about 1185.1875278714.

The spelling of 1664796744 in words is "one billion, six hundred sixty-four million, seven hundred ninety-six thousand, seven hundred forty-four".