664001132 has 24 divisors (see below), whose sum is σ = 1227614640. Its totient is φ = 313381440.

The previous prime is 664001131. The next prime is 664001137. The reversal of 664001132 is 231100466.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 664001098 and 664001107.

It is not an unprimeable number, because it can be changed into a prime (664001131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5282 + ... + 36822.

It is an arithmetic number, because the mean of its divisors is an integer number (51150610).

Almost surely, 2^664001132 is an apocalyptic number.

It is an amenable number.

664001132 is a deficient number, since it is larger than the sum of its proper divisors (563613508).

664001132 is a wasteful number, since it uses less digits than its factorization.

664001132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31841 (or 31839 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 664001132 is about 25768.2194185008. The cubic root of 664001132 is about 872.4146300602.

Adding to 664001132 its reverse (231100466), we get a palindrome (895101598).

The spelling of 664001132 in words is "six hundred sixty-four million, one thousand, one hundred thirty-two".