664126313420 has 24 divisors (see below), whose sum is σ = 1404025434000. Its totient is φ = 263867634752.

The previous prime is 664126313407. The next prime is 664126313483. The reversal of 664126313420 is 24313621466.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111427610 + ... + 111433569.

It is an arithmetic number, because the mean of its divisors is an integer number (58501059750).

Almost surely, 2^664126313420 is an apocalyptic number.

It is an amenable number.

664126313420 is an abundant number, since it is smaller than the sum of its proper divisors (739899120580).

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

664126313420 is a wasteful number, since it uses less digits than its factorization.

664126313420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222861337 (or 222861335 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 38.

Adding to 664126313420 its reverse (24313621466), we get a palindrome (688439934886).

The spelling of 664126313420 in words is "six hundred sixty-four billion, one hundred twenty-six million, three hundred thirteen thousand, four hundred twenty".