66651066675 has 60 divisors (see below), whose sum is σ = 123969799800. Its totient is φ = 35546973120.

The previous prime is 66651066641. The next prime is 66651066707. The reversal of 66651066675 is 57666015666.

66651066675 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 66651066675 - 2¹⁰ = 66651065651 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 424351 + ... + 559799.

It is an arithmetic number, because the mean of its divisors is an integer number (2066163330).

Almost surely, 2^66651066675 is an apocalyptic number.

66651066675 is a deficient number, since it is larger than the sum of its proper divisors (57318733125).

66651066675 is an frugal number, since it uses more digits than its factorization.

66651066675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135486 (or 135457 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 54.

The spelling of 66651066675 in words is "sixty-six billion, six hundred fifty-one million, sixty-six thousand, six hundred seventy-five".