665532413 has 8 divisors (see below), whose sum is σ = 819116928. Its totient is φ = 526575024.

The previous prime is 665532407. The next prime is 665532443. The reversal of 665532413 is 314235566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 665532413 - 2⁸ = 665532157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665532443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3656681 + ... + 3656862.

It is an arithmetic number, because the mean of its divisors is an integer number (102389616).

Almost surely, 2^665532413 is an apocalyptic number.

It is an amenable number.

665532413 is a deficient number, since it is larger than the sum of its proper divisors (153584515).

665532413 is a wasteful number, since it uses less digits than its factorization.

665532413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7313563.

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

The square root of 665532413 is about 25797.9148963632. The cubic root of 665532413 is about 873.0847525756.

Adding to 665532413 its reverse (314235566), we get a palindrome (979767979).

The spelling of 665532413 in words is "six hundred sixty-five million, five hundred thirty-two thousand, four hundred thirteen".