665022455 has 4 divisors (see below), whose sum is σ = 798026952. Its totient is φ = 532017960.

The previous prime is 665022451. The next prime is 665022467. The reversal of 665022455 is 554220566.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 665022455 - 2² = 665022451 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665022451) 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, 66502241 + ... + 66502250.

It is an arithmetic number, because the mean of its divisors is an integer number (199506738).

Almost surely, 2^665022455 is an apocalyptic number.

665022455 is a deficient number, since it is larger than the sum of its proper divisors (133004497).

665022455 is a wasteful number, since it uses less digits than its factorization.

665022455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133004496.

The product of its (nonzero) digits is 72000, while the sum is 35.

The square root of 665022455 is about 25788.0292965554. The cubic root of 665022455 is about 872.8616979137.

The spelling of 665022455 in words is "six hundred sixty-five million, twenty-two thousand, four hundred fifty-five".