16601601061 has 2 divisors, whose sum is σ = 16601601062. Its totient is φ = 16601601060.

The previous prime is 16601601053. The next prime is 16601601083. The reversal of 16601601061 is 16010610661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15388402500 + 1213198561 = 124050^2 + 34831^2 .

It is a cyclic number.

It is not a de Polignac number, because 16601601061 - 2³ = 16601601053 is a prime.

It is a super-2 number, since 2×16601601061² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16601601011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8300800530 + 8300800531.

It is an arithmetic number, because the mean of its divisors is an integer number (8300800531).

Almost surely, 2^16601601061 is an apocalyptic number.

It is an amenable number.

16601601061 is a deficient number, since it is larger than the sum of its proper divisors (1).

16601601061 is an equidigital number, since it uses as much as digits as its factorization.

16601601061 is an evil number, because the sum of its binary digits is even.

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

The spelling of 16601601061 in words is "sixteen billion, six hundred one million, six hundred one thousand, sixty-one".