665465523 has 8 divisors (see below), whose sum is σ = 917883600. Its totient is φ = 428345568.

The previous prime is 665465513. The next prime is 665465551. The reversal of 665465523 is 325564566.

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

It is not a de Polignac number, because 665465523 - 2⁹ = 665465011 is a prime.

It is a super-4 number, since 4×665465523⁴ (a number of 36 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (665465503) 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, 3824428 + ... + 3824601.

It is an arithmetic number, because the mean of its divisors is an integer number (114735450).

Almost surely, 2^665465523 is an apocalyptic number.

665465523 is a deficient number, since it is larger than the sum of its proper divisors (252418077).

665465523 is a wasteful number, since it uses less digits than its factorization.

665465523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7649061.

The product of its digits is 648000, while the sum is 42.

The square root of 665465523 is about 25796.6184411833. The cubic root of 665465523 is about 873.0555015106.

The spelling of 665465523 in words is "six hundred sixty-five million, four hundred sixty-five thousand, five hundred twenty-three".