664478512422 has 8 divisors (see below), whose sum is σ = 1328957024856. Its totient is φ = 221492837472.

The previous prime is 664478512421. The next prime is 664478512427. The reversal of 664478512422 is 224215874466.

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

664478512422 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664478512421) 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, 55373209363 + ... + 55373209374.

It is an arithmetic number, because the mean of its divisors is an integer number (166119628107).

Almost surely, 2^664478512422 is an apocalyptic number.

664478512422 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664478512422 is a wasteful number, since it uses less digits than its factorization.

664478512422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110746418742.

The product of its digits is 5160960, while the sum is 51.

The spelling of 664478512422 in words is "six hundred sixty-four billion, four hundred seventy-eight million, five hundred twelve thousand, four hundred twenty-two".