664581546622 has 32 divisors (see below), whose sum is σ = 1199310094080. Its totient is φ = 269815432320.

The previous prime is 664581546611. The next prime is 664581546659. The reversal of 664581546622 is 226645185466.

It is a super-2 number, since 2×664581546622² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5778297 + ... + 5892187.

It is an arithmetic number, because the mean of its divisors is an integer number (37478440440).

Almost surely, 2^664581546622 is an apocalyptic number.

664581546622 is a deficient number, since it is larger than the sum of its proper divisors (534728547458).

664581546622 is a wasteful number, since it uses less digits than its factorization.

664581546622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135856.

The product of its digits is 16588800, while the sum is 55.

The spelling of 664581546622 in words is "six hundred sixty-four billion, five hundred eighty-one million, five hundred forty-six thousand, six hundred twenty-two".