661306110110 has 32 divisors (see below), whose sum is σ = 1242326030400. Its totient is φ = 252976523008.

The previous prime is 661306110071. The next prime is 661306110121. The reversal of 661306110110 is 11011603166.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 661306110110.

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, 1056866 + ... + 1561914.

It is an arithmetic number, because the mean of its divisors is an integer number (38822688450).

Almost surely, 2^661306110110 is an apocalyptic number.

661306110110 is a deficient number, since it is larger than the sum of its proper divisors (581019920290).

661306110110 is a wasteful number, since it uses less digits than its factorization.

661306110110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510772.

The product of its (nonzero) digits is 648, while the sum is 26.

Adding to 661306110110 its reverse (11011603166), we get a palindrome (672317713276).

The spelling of 661306110110 in words is "six hundred sixty-one billion, three hundred six million, one hundred ten thousand, one hundred ten".