1664305757411 has 4 divisors (see below), whose sum is σ = 1815606280824. Its totient is φ = 1513005234000.

The previous prime is 1664305757377. The next prime is 1664305757417. The reversal of 1664305757411 is 1147575034661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1664305757411 - 2³⁸ = 1389427850467 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1664305757411.

It is not an unprimeable number, because it can be changed into a prime (1664305757417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75650261690 + ... + 75650261711.

It is an arithmetic number, because the mean of its divisors is an integer number (453901570206).

Almost surely, 2^{1664305757411} is an apocalyptic number.

1664305757411 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1664305757411 is a deficient number, since it is larger than the sum of its proper divisors (151300523413).

1664305757411 is a wasteful number, since it uses less digits than its factorization.

1664305757411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151300523412.

The product of its (nonzero) digits is 2116800, while the sum is 50.

The spelling of 1664305757411 in words is "one trillion, six hundred sixty-four billion, three hundred five million, seven hundred fifty-seven thousand, four hundred eleven".