665460545 has 16 divisors (see below), whose sum is σ = 835446528. Its totient is φ = 508325760.

The previous prime is 665460511. The next prime is 665460557. The reversal of 665460545 is 545064566.

665460545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 665460545 - 2¹⁰ = 665459521 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24899 + ... + 44168.

It is an arithmetic number, because the mean of its divisors is an integer number (52215408).

Almost surely, 2^665460545 is an apocalyptic number.

It is an amenable number.

665460545 is a deficient number, since it is larger than the sum of its proper divisors (169985983).

665460545 is a wasteful number, since it uses less digits than its factorization.

665460545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69160.

The product of its (nonzero) digits is 432000, while the sum is 41.

The square root of 665460545 is about 25796.5219554885. The cubic root of 665460545 is about 873.0533245477.

The spelling of 665460545 in words is "six hundred sixty-five million, four hundred sixty thousand, five hundred forty-five".