66235662505 has 16 divisors (see below), whose sum is σ = 82317233664. Its totient is φ = 51130663360.

The previous prime is 66235662487. The next prime is 66235662511. The reversal of 66235662505 is 50526653266.

It is a happy number.

66235662505 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 66235662505 - 2⁷ = 66235662377 is a prime.

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, 1968202 + ... + 2001571.

It is an arithmetic number, because the mean of its divisors is an integer number (5144827104).

Almost surely, 2^66235662505 is an apocalyptic number.

It is an amenable number.

66235662505 is a deficient number, since it is larger than the sum of its proper divisors (16081571159).

66235662505 is a wasteful number, since it uses less digits than its factorization.

66235662505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3969896.

The product of its (nonzero) digits is 1944000, while the sum is 46.

The spelling of 66235662505 in words is "sixty-six billion, two hundred thirty-five million, six hundred sixty-two thousand, five hundred five".