66160069 has 2 divisors, whose sum is σ = 66160070. Its totient is φ = 66160068.

The previous prime is 66160037. The next prime is 66160079. The reversal of 66160069 is 96006166.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35224225 + 30935844 = 5935^2 + 5562^2 .

It is a cyclic number.

It is not a de Polignac number, because 66160069 - 2⁵ = 66160037 is a prime.

It is a super-2 number, since 2×66160069² = 8754309460169522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66160009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33080034 + 33080035.

It is an arithmetic number, because the mean of its divisors is an integer number (33080035).

Almost surely, 2^66160069 is an apocalyptic number.

It is an amenable number.

66160069 is a deficient number, since it is larger than the sum of its proper divisors (1).

66160069 is an equidigital number, since it uses as much as digits as its factorization.

66160069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 66160069 is about 8133.8840045823. The cubic root of 66160069 is about 404.4504439803.

The spelling of 66160069 in words is "sixty-six million, one hundred sixty thousand, sixty-nine".