665170518445 has 32 divisors (see below), whose sum is σ = 851171460480. Its totient is φ = 497592668160.

The previous prime is 665170518371. The next prime is 665170518461. The reversal of 665170518445 is 544815071566.

665170518445 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 665170518445 - 2⁷ = 665170518317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 665170518392 and 665170518401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2458582 + ... + 2715688.

It is an arithmetic number, because the mean of its divisors is an integer number (26599108140).

Almost surely, 2^665170518445 is an apocalyptic number.

It is an amenable number.

665170518445 is a deficient number, since it is larger than the sum of its proper divisors (186000942035).

665170518445 is a wasteful number, since it uses less digits than its factorization.

665170518445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257485.

The product of its (nonzero) digits is 4032000, while the sum is 52.

The spelling of 665170518445 in words is "six hundred sixty-five billion, one hundred seventy million, five hundred eighteen thousand, four hundred forty-five".