66454047227 has 4 divisors (see below), whose sum is σ = 69951628680. Its totient is φ = 62956465776.

The previous prime is 66454047221. The next prime is 66454047239. The reversal of 66454047227 is 72274045466.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66454047227 - 2⁴ = 66454047211 is a prime.

It is a super-2 number, since 2×66454047227² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66454047221) 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 3 ways as a sum of consecutive naturals, for example, 1748790698 + ... + 1748790735.

It is an arithmetic number, because the mean of its divisors is an integer number (17487907170).

Almost surely, 2^66454047227 is an apocalyptic number.

66454047227 is a deficient number, since it is larger than the sum of its proper divisors (3497581453).

66454047227 is a wasteful number, since it uses less digits than its factorization.

66454047227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3497581452.

The product of its (nonzero) digits is 2257920, while the sum is 47.

The spelling of 66454047227 in words is "sixty-six billion, four hundred fifty-four million, forty-seven thousand, two hundred twenty-seven".