664452532 has 12 divisors (see below), whose sum is σ = 1163056356. Its totient is φ = 332150720.

The previous prime is 664452521. The next prime is 664452533. The reversal of 664452532 is 235254466.

It can be written as a sum of positive squares in 2 ways, for example, as 45239076 + 619213456 = 6726^2 + 24884^2 .

It is a super-2 number, since 2×664452532² = 882994334562422048, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 664452491 and 664452500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664452533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3978 + ... + 36670.

It is an arithmetic number, because the mean of its divisors is an integer number (96921363).

Almost surely, 2^664452532 is an apocalyptic number.

It is an amenable number.

664452532 is a deficient number, since it is larger than the sum of its proper divisors (498603824).

664452532 is a wasteful number, since it uses less digits than its factorization.

664452532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37778 (or 37776 counting only the distinct ones).

The product of its digits is 172800, while the sum is 37.

The square root of 664452532 is about 25776.9767816166. The cubic root of 664452532 is about 872.6122797023.

The spelling of 664452532 in words is "six hundred sixty-four million, four hundred fifty-two thousand, five hundred thirty-two".