66164069 has 2 divisors, whose sum is σ = 66164070. Its totient is φ = 66164068.

The previous prime is 66164053. The next prime is 66164081. The reversal of 66164069 is 96046166.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57532225 + 8631844 = 7585^2 + 2938^2 .

It is a cyclic number.

It is not a de Polignac number, because 66164069 - 2⁴ = 66164053 is a prime.

It is a super-2 number, since 2×66164069² = 8755368053273522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66164009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33082034 + 33082035.

It is an arithmetic number, because the mean of its divisors is an integer number (33082035).

Almost surely, 2^66164069 is an apocalyptic number.

It is an amenable number.

66164069 is a deficient number, since it is larger than the sum of its proper divisors (1).

66164069 is an equidigital number, since it uses as much as digits as its factorization.

66164069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 66164069 is about 8134.1298858575. The cubic root of 66164069 is about 404.4585947637.

The spelling of 66164069 in words is "sixty-six million, one hundred sixty-four thousand, sixty-nine".