1664883755 has 4 divisors (see below), whose sum is σ = 1997860512. Its totient is φ = 1331907000.

The previous prime is 1664883749. The next prime is 1664883809. The reversal of 1664883755 is 5573884661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5573884661 = 31 ⋅179802731.

It is not a de Polignac number, because 1664883755 - 2⁶ = 1664883691 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1664883697 and 1664883706.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166488371 + ... + 166488380.

It is an arithmetic number, because the mean of its divisors is an integer number (499465128).

Almost surely, 2^1664883755 is an apocalyptic number.

1664883755 is a deficient number, since it is larger than the sum of its proper divisors (332976757).

1664883755 is an equidigital number, since it uses as much as digits as its factorization.

1664883755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332976756.

The product of its digits is 4838400, while the sum is 53.

The square root of 1664883755 is about 40802.9870842810. The cubic root of 1664883755 is about 1185.2081755483.

The spelling of 1664883755 in words is "one billion, six hundred sixty-four million, eight hundred eighty-three thousand, seven hundred fifty-five".