16166764777 has 2 divisors, whose sum is σ = 16166764778. Its totient is φ = 16166764776.

The previous prime is 16166764673. The next prime is 16166764807. The reversal of 16166764777 is 77746766161.

16166764777 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12468178921 + 3698585856 = 111661^2 + 60816^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16166764777 is a prime.

It is a super-2 number, since 2×16166764777² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16166764477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8083382388 + 8083382389.

It is an arithmetic number, because the mean of its divisors is an integer number (8083382389).

Almost surely, 2^16166764777 is an apocalyptic number.

It is an amenable number.

16166764777 is a deficient number, since it is larger than the sum of its proper divisors (1).

16166764777 is an equidigital number, since it uses as much as digits as its factorization.

16166764777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12446784, while the sum is 58.

The spelling of 16166764777 in words is "sixteen billion, one hundred sixty-six million, seven hundred sixty-four thousand, seven hundred seventy-seven".