661006115110 has 32 divisors (see below), whose sum is σ = 1303026188832. Its totient is φ = 239430574080.

The previous prime is 661006115071. The next prime is 661006115123. The reversal of 661006115110 is 11511600166.

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, 11662677 + ... + 11719216.

It is an arithmetic number, because the mean of its divisors is an integer number (40719568401).

Almost surely, 2^661006115110 is an apocalyptic number.

661006115110 is a deficient number, since it is larger than the sum of its proper divisors (642020073722).

661006115110 is a wasteful number, since it uses less digits than its factorization.

661006115110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23382168.

The product of its (nonzero) digits is 1080, while the sum is 28.

Adding to 661006115110 its reverse (11511600166), we get a palindrome (672517715276).

The spelling of 661006115110 in words is "six hundred sixty-one billion, six million, one hundred fifteen thousand, one hundred ten".