1664532479 has 4 divisors (see below), whose sum is σ = 1666034520. Its totient is φ = 1663030440.

The previous prime is 1664532439. The next prime is 1664532481. The reversal of 1664532479 is 9742354661.

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 1664532479 - 2²⁰ = 1663483903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664532409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 749357 + ... + 751574.

It is an arithmetic number, because the mean of its divisors is an integer number (416508630).

Almost surely, 2^1664532479 is an apocalyptic number.

1664532479 is a deficient number, since it is larger than the sum of its proper divisors (1502041).

1664532479 is a wasteful number, since it uses less digits than its factorization.

1664532479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1502040.

The product of its digits is 1088640, while the sum is 47.

The square root of 1664532479 is about 40798.6823194083. The cubic root of 1664532479 is about 1185.1248134776.

The spelling of 1664532479 in words is "one billion, six hundred sixty-four million, five hundred thirty-two thousand, four hundred seventy-nine".