661005034445 has 32 divisors (see below), whose sum is σ = 1010364192000. Its totient is φ = 404145662976.

The previous prime is 661005034433. The next prime is 661005034453. The reversal of 661005034445 is 544430500166.

It is a cyclic number.

It is not a de Polignac number, because 661005034445 - 2¹⁰ = 661005033421 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 661005034399 and 661005034408.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29223770 + ... + 29246379.

It is an arithmetic number, because the mean of its divisors is an integer number (31573881000).

Almost surely, 2^661005034445 is an apocalyptic number.

It is an amenable number.

661005034445 is a deficient number, since it is larger than the sum of its proper divisors (349359157555).

661005034445 is a wasteful number, since it uses less digits than its factorization.

661005034445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58470197.

The product of its (nonzero) digits is 172800, while the sum is 38.

The spelling of 661005034445 in words is "six hundred sixty-one billion, five million, thirty-four thousand, four hundred forty-five".