661822824002 has 6 divisors (see below), whose sum is σ = 992735961753. Its totient is φ = 330910836752.

The previous prime is 661822823887. The next prime is 661822824011. The reversal of 661822824002 is 200428228166.

It can be written as a sum of positive squares in 2 ways, for example, as 585088837921 + 76733986081 = 764911^2 + 277009^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=575249.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 862874 + ... + 1438122.

Almost surely, 2^661822824002 is an apocalyptic number.

661822824002 is a deficient number, since it is larger than the sum of its proper divisors (330913137751).

661822824002 is an frugal number, since it uses more digits than its factorization.

661822824002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1150500 (or 575251 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 41.

The spelling of 661822824002 in words is "six hundred sixty-one billion, eight hundred twenty-two million, eight hundred twenty-four thousand, two".