16606777129 has 2 divisors, whose sum is σ = 16606777130. Its totient is φ = 16606777128.

The previous prime is 16606777111. The next prime is 16606777133. The reversal of 16606777129 is 92177760661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12728352400 + 3878424729 = 112820^2 + 62277^2 .

It is a cyclic number.

It is not a de Polignac number, because 16606777129 - 2⁷ = 16606777001 is a prime.

It is a super-2 number, since 2×16606777129² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16606777829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8303388564 + 8303388565.

It is an arithmetic number, because the mean of its divisors is an integer number (8303388565).

Almost surely, 2^16606777129 is an apocalyptic number.

It is an amenable number.

16606777129 is a deficient number, since it is larger than the sum of its proper divisors (1).

16606777129 is an equidigital number, since it uses as much as digits as its factorization.

16606777129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1333584, while the sum is 52.

The spelling of 16606777129 in words is "sixteen billion, six hundred six million, seven hundred seventy-seven thousand, one hundred twenty-nine".