66475211667 has 8 divisors (see below), whose sum is σ = 88653736080. Its totient is φ = 44306747520.

The previous prime is 66475211653. The next prime is 66475211701. The reversal of 66475211667 is 76611257466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66475211667 - 2¹⁸ = 66474949523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66475211167) 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 7 ways as a sum of consecutive naturals, for example, 2499634 + ... + 2526087.

It is an arithmetic number, because the mean of its divisors is an integer number (11081717010).

Almost surely, 2^66475211667 is an apocalyptic number.

66475211667 is a deficient number, since it is larger than the sum of its proper divisors (22178524413).

66475211667 is a wasteful number, since it uses less digits than its factorization.

66475211667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5030133.

The product of its digits is 2540160, while the sum is 51.

The spelling of 66475211667 in words is "sixty-six billion, four hundred seventy-five million, two hundred eleven thousand, six hundred sixty-seven".