666042202505 has 16 divisors (see below), whose sum is σ = 801281669760. Its totient is φ = 531481402368.

The previous prime is 666042202499. The next prime is 666042202589. The reversal of 666042202505 is 505202240666.

666042202505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 666042202505 - 2⁸ = 666042202249 is a prime.

It is a super-2 number, since 2×666042202505² (a number of 24 digits) contains 22 as substring.

It is a Curzon 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, 3136169 + ... + 3341801.

It is an arithmetic number, because the mean of its divisors is an integer number (50080104360).

Almost surely, 2^666042202505 is an apocalyptic number.

It is an amenable number.

666042202505 is a deficient number, since it is larger than the sum of its proper divisors (135239467255).

666042202505 is a wasteful number, since it uses less digits than its factorization.

666042202505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207280.

The product of its (nonzero) digits is 172800, while the sum is 38.

The spelling of 666042202505 in words is "six hundred sixty-six billion, forty-two million, two hundred two thousand, five hundred five".