705665145 has 16 divisors (see below), whose sum is σ = 1156603392. Its totient is φ = 367175040.

The previous prime is 705665143. The next prime is 705665173. The reversal of 705665145 is 541566507.

705665145 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 705665145 - 2¹ = 705665143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (705665143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 573097 + ... + 574326.

It is an arithmetic number, because the mean of its divisors is an integer number (72287712).

Almost surely, 2^705665145 is an apocalyptic number.

It is an amenable number.

705665145 is a deficient number, since it is larger than the sum of its proper divisors (450938247).

705665145 is a wasteful number, since it uses less digits than its factorization.

705665145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1147472.

The product of its (nonzero) digits is 126000, while the sum is 39.

The square root of 705665145 is about 26564.3585467445. The cubic root of 705665145 is about 890.2928569548.

The spelling of 705665145 in words is "seven hundred five million, six hundred sixty-five thousand, one hundred forty-five".