665452405 has 8 divisors (see below), whose sum is σ = 799169184. Its totient is φ = 531944400.

The previous prime is 665452397. The next prime is 665452439. The reversal of 665452405 is 504254566.

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

It is not a de Polignac number, because 665452405 - 2³ = 665452397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45091 + ... + 58000.

It is an arithmetic number, because the mean of its divisors is an integer number (99896148).

Almost surely, 2^665452405 is an apocalyptic number.

It is an amenable number.

665452405 is a deficient number, since it is larger than the sum of its proper divisors (133716779).

665452405 is a wasteful number, since it uses less digits than its factorization.

665452405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104387.

The product of its (nonzero) digits is 144000, while the sum is 37.

The square root of 665452405 is about 25796.3641817990. The cubic root of 665452405 is about 873.0497647659.

The spelling of 665452405 in words is "six hundred sixty-five million, four hundred fifty-two thousand, four hundred five".