664827038227 has 4 divisors (see below), whose sum is σ = 725265859896. Its totient is φ = 604388216560.

The previous prime is 664827038209. The next prime is 664827038233. The reversal of 664827038227 is 722830728466.

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 664827038227 - 2¹⁵ = 664827005459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664827038237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30219410818 + ... + 30219410839.

It is an arithmetic number, because the mean of its divisors is an integer number (181316464974).

Almost surely, 2^664827038227 is an apocalyptic number.

664827038227 is a deficient number, since it is larger than the sum of its proper divisors (60438821669).

664827038227 is a wasteful number, since it uses less digits than its factorization.

664827038227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60438821668.

The product of its (nonzero) digits is 10838016, while the sum is 55.

The spelling of 664827038227 in words is "six hundred sixty-four billion, eight hundred twenty-seven million, thirty-eight thousand, two hundred twenty-seven".