16001561066610 has 64 divisors (see below), whose sum is σ = 43923071434752. Its totient is φ = 3654743391936.

The previous prime is 16001561066551. The next prime is 16001561066611. The reversal of 16001561066610 is 1666016510061.

It is not an unprimeable number, because it can be changed into a prime (16001561066611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28431922 + ... + 28989261.

It is an arithmetic number, because the mean of its divisors is an integer number (686297991168).

Almost surely, 2^{16001561066610} is an apocalyptic number.

16001561066610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16001561066610 is an abundant number, since it is smaller than the sum of its proper divisors (27921510368142).

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

16001561066610 is a wasteful number, since it uses less digits than its factorization.

16001561066610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57422527.

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

Adding to 16001561066610 its reverse (1666016510061), we get a palindrome (17667577576671).

The spelling of 16001561066610 in words is "sixteen trillion, one billion, five hundred sixty-one million, sixty-six thousand, six hundred ten".