661166110 has 64 divisors (see below), whose sum is σ = 1327886784. Its totient is φ = 235008000.

The previous prime is 661166101. The next prime is 661166141. The reversal of 661166110 is 11661166.

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, 1099810 + ... + 1100410.

It is an arithmetic number, because the mean of its divisors is an integer number (20748231).

Almost surely, 2^661166110 is an apocalyptic number.

661166110 is an abundant number, since it is smaller than the sum of its proper divisors (666720674).

661166110 is a wasteful number, since it uses less digits than its factorization.

661166110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 661166110 is about 25713.1505265302. The cubic root of 661166110 is about 871.1712370657.

It can be divided in two parts, 6 and 61166110, that added together give a palindrome (61166116).

The spelling of 661166110 in words is "six hundred sixty-one million, one hundred sixty-six thousand, one hundred ten".