665534132 has 12 divisors (see below), whose sum is σ = 1165243716. Its totient is φ = 332607360.

The previous prime is 665534131. The next prime is 665534159. The reversal of 665534132 is 231435566.

It can be written as a sum of positive squares in 2 ways, for example, as 509134096 + 156400036 = 22564^2 + 12506^2 .

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 665534092 and 665534101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665534131) 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, 30293 + ... + 47420.

It is an arithmetic number, because the mean of its divisors is an integer number (97103643).

Almost surely, 2^665534132 is an apocalyptic number.

It is an amenable number.

665534132 is a deficient number, since it is larger than the sum of its proper divisors (499709584).

665534132 is a wasteful number, since it uses less digits than its factorization.

665534132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79858 (or 79856 counting only the distinct ones).

The product of its digits is 64800, while the sum is 35.

The square root of 665534132 is about 25797.9482129878. The cubic root of 665534132 is about 873.0855042702.

Adding to 665534132 its reverse (231435566), we get a palindrome (896969698).

The spelling of 665534132 in words is "six hundred sixty-five million, five hundred thirty-four thousand, one hundred thirty-two".