16610656555061 has 2 divisors, whose sum is σ = 16610656555062. Its totient is φ = 16610656555060.

The previous prime is 16610656555043. The next prime is 16610656555069. The reversal of 16610656555061 is 16055565601661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14716507164100 + 1894149390961 = 3836210^2 + 1376281^2 .

It is a cyclic number.

It is not a de Polignac number, because 16610656555061 - 2⁶ = 16610656554997 is a prime.

It is a super-3 number, since 3×16610656555061³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 16610656554994 and 16610656555012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16610656555069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8305328277530 + 8305328277531.

It is an arithmetic number, because the mean of its divisors is an integer number (8305328277531).

Almost surely, 2^{16610656555061} is an apocalyptic number.

It is an amenable number.

16610656555061 is a deficient number, since it is larger than the sum of its proper divisors (1).

16610656555061 is an equidigital number, since it uses as much as digits as its factorization.

16610656555061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860000, while the sum is 53.

The spelling of 16610656555061 in words is "sixteen trillion, six hundred ten billion, six hundred fifty-six million, five hundred fifty-five thousand, sixty-one".