665464155 has 8 divisors (see below), whose sum is σ = 1064742672. Its totient is φ = 354914208.

The previous prime is 665464141. The next prime is 665464157. The reversal of 665464155 is 551464566.

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

It is not a de Polignac number, because 665464155 - 2⁵ = 665464123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (665464157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22182124 + ... + 22182153.

It is an arithmetic number, because the mean of its divisors is an integer number (133092834).

Almost surely, 2^665464155 is an apocalyptic number.

665464155 is a deficient number, since it is larger than the sum of its proper divisors (399278517).

665464155 is a wasteful number, since it uses less digits than its factorization.

665464155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44364285.

The product of its digits is 432000, while the sum is 42.

The square root of 665464155 is about 25796.5919260665. The cubic root of 665464155 is about 873.0549032623.

The spelling of 665464155 in words is "six hundred sixty-five million, four hundred sixty-four thousand, one hundred fifty-five".