661065161106 has 32 divisors (see below), whose sum is σ = 1515215047680. Its totient is φ = 188349639696.

The previous prime is 661065161093. The next prime is 661065161111. The reversal of 661065161106 is 601161560166.

It is a Curzon 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, 21906436 + ... + 21936591.

It is an arithmetic number, because the mean of its divisors is an integer number (47350470240).

Almost surely, 2^661065161106 is an apocalyptic number.

661065161106 is an abundant number, since it is smaller than the sum of its proper divisors (854149886574).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

661065161106 is a wasteful number, since it uses less digits than its factorization.

661065161106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43843398.

The product of its (nonzero) digits is 38880, while the sum is 39.

The spelling of 661065161106 in words is "six hundred sixty-one billion, sixty-five million, one hundred sixty-one thousand, one hundred six".