661161056110 has 64 divisors (see below), whose sum is σ = 1267279478784. Its totient is φ = 247489804800.

The previous prime is 661161056089. The next prime is 661161056123. The reversal of 661161056110 is 11650161166.

661161056110 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108544165 + ... + 108550255.

It is an arithmetic number, because the mean of its divisors is an integer number (19801241856).

Almost surely, 2^661161056110 is an apocalyptic number.

661161056110 is a deficient number, since it is larger than the sum of its proper divisors (606118422674).

661161056110 is a wasteful number, since it uses less digits than its factorization.

661161056110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9649.

The product of its (nonzero) digits is 6480, while the sum is 34.

It can be divided in two parts, 661161056 and 110, that added together give a palindrome (661161166).

The spelling of 661161056110 in words is "six hundred sixty-one billion, one hundred sixty-one million, fifty-six thousand, one hundred ten".