611660560505 has 8 divisors (see below), whose sum is σ = 734488287624. Its totient is φ = 488998038400.

The previous prime is 611660560447. The next prime is 611660560519. The reversal of 611660560505 is 505065066116.

It can be written as a sum of positive squares in 4 ways, for example, as 78532776169 + 533127784336 = 280237^2 + 730156^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 611660560505 - 2¹⁰ = 611660559481 is a prime.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 41293106 + ... + 41307915.

It is an arithmetic number, because the mean of its divisors is an integer number (91811035953).

Almost surely, 2^611660560505 is an apocalyptic number.

It is an amenable number.

611660560505 is a deficient number, since it is larger than the sum of its proper divisors (122827727119).

611660560505 is a wasteful number, since it uses less digits than its factorization.

611660560505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82602507.

The product of its (nonzero) digits is 162000, while the sum is 41.

The spelling of 611660560505 in words is "six hundred eleven billion, six hundred sixty million, five hundred sixty thousand, five hundred five".