664222046620 has 48 divisors (see below), whose sum is σ = 1557060075648. Its totient is φ = 235918186560.

The previous prime is 664222046599. The next prime is 664222046627. The reversal of 664222046620 is 26640222466.

It is a happy number.

It is a super-2 number, since 2×664222046620² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664222046627) 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 15 ways as a sum of consecutive naturals, for example, 35097414 + ... + 35116333.

It is an arithmetic number, because the mean of its divisors is an integer number (32438751576).

Almost surely, 2^664222046620 is an apocalyptic number.

It is an amenable number.

664222046620 is an abundant number, since it is smaller than the sum of its proper divisors (892838029028).

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

664222046620 is a wasteful number, since it uses less digits than its factorization.

664222046620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70213810 (or 70213808 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 40.

The spelling of 664222046620 in words is "six hundred sixty-four billion, two hundred twenty-two million, forty-six thousand, six hundred twenty".