16766621141 has 2 divisors, whose sum is σ = 16766621142. Its totient is φ = 16766621140.

The previous prime is 16766621129. The next prime is 16766621173. The reversal of 16766621141 is 14112666761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14005539025 + 2761082116 = 118345^2 + 52546^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16766621141 is a prime.

It is a super-2 number, since 2×16766621141² (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 (16766621111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8383310570 + 8383310571.

It is an arithmetic number, because the mean of its divisors is an integer number (8383310571).

Almost surely, 2^16766621141 is an apocalyptic number.

It is an amenable number.

16766621141 is a deficient number, since it is larger than the sum of its proper divisors (1).

16766621141 is an equidigital number, since it uses as much as digits as its factorization.

16766621141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 41.

The spelling of 16766621141 in words is "sixteen billion, seven hundred sixty-six million, six hundred twenty-one thousand, one hundred forty-one".