664822472027 has 4 divisors (see below), whose sum is σ = 759797110896. Its totient is φ = 569847833160.

The previous prime is 664822472011. The next prime is 664822472047. The reversal of 664822472027 is 720274228466.

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 664822472027 - 2⁴ = 664822472011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664822472047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47487319424 + ... + 47487319437.

It is an arithmetic number, because the mean of its divisors is an integer number (189949277724).

Almost surely, 2^664822472027 is an apocalyptic number.

664822472027 is a deficient number, since it is larger than the sum of its proper divisors (94974638869).

664822472027 is an equidigital number, since it uses as much as digits as its factorization.

664822472027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94974638868.

The product of its (nonzero) digits is 3612672, while the sum is 50.

The spelling of 664822472027 in words is "six hundred sixty-four billion, eight hundred twenty-two million, four hundred seventy-two thousand, twenty-seven".