1664012432 has 20 divisors (see below), whose sum is σ = 3225054000. Its totient is φ = 831740448.

The previous prime is 1664012417. The next prime is 1664012447. The reversal of 1664012432 is 2342104661.

It is an interprime number because it is at equal distance from previous prime (1664012417) and next prime (1664012447).

1664012432 is a modest number, since divided by 12432 gives 1664 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 1664012395 and 1664012404.

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 3 ways as a sum of consecutive naturals, for example, 41123 + ... + 70845.

It is an arithmetic number, because the mean of its divisors is an integer number (161252700).

Almost surely, 2^1664012432 is an apocalyptic number.

It is an amenable number.

1664012432 is a deficient number, since it is larger than the sum of its proper divisors (1561041568).

1664012432 is a wasteful number, since it uses less digits than its factorization.

1664012432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33230 (or 33224 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 1664012432 is about 40792.3084906947. The cubic root of 1664012432 is about 1185.0013784575.

The spelling of 1664012432 in words is "one billion, six hundred sixty-four million, twelve thousand, four hundred thirty-two".