66701069 has 2 divisors, whose sum is σ = 66701070. Its totient is φ = 66701068.

The previous prime is 66701051. The next prime is 66701087. The reversal of 66701069 is 96010766.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (66701051) and next prime (66701087).

It can be written as a sum of positive squares in only one way, i.e., 57183844 + 9517225 = 7562^2 + 3085^2 .

It is a cyclic number.

It is not a de Polignac number, because 66701069 - 2⁸ = 66700813 is a prime.

It is a super-2 number, since 2×66701069² = 8898065211485522, 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 (66701099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33350534 + 33350535.

It is an arithmetic number, because the mean of its divisors is an integer number (33350535).

Almost surely, 2^66701069 is an apocalyptic number.

It is an amenable number.

66701069 is a deficient number, since it is larger than the sum of its proper divisors (1).

66701069 is an equidigital number, since it uses as much as digits as its factorization.

66701069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 66701069 is about 8167.0722416298. The cubic root of 66701069 is about 405.5498683578.

The spelling of 66701069 in words is "sixty-six million, seven hundred one thousand, sixty-nine".