665065500099 has 32 divisors (see below), whose sum is σ = 1190606774784. Its totient is φ = 318912526080.

The previous prime is 665065500089. The next prime is 665065500101. The reversal of 665065500099 is 990005560566.

It is not a de Polignac number, because 665065500099 - 2⁹ = 665065499587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (665065500019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110730514 + ... + 110736519.

It is an arithmetic number, because the mean of its divisors is an integer number (37206461712).

Almost surely, 2^665065500099 is an apocalyptic number.

665065500099 is a deficient number, since it is larger than the sum of its proper divisors (525541274685).

665065500099 is a wasteful number, since it uses less digits than its factorization.

665065500099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221467067.

The product of its (nonzero) digits is 2187000, while the sum is 51.

The spelling of 665065500099 in words is "six hundred sixty-five billion, sixty-five million, five hundred thousand, ninety-nine".