66672269 has 2 divisors, whose sum is σ = 66672270. Its totient is φ = 66672268.

The previous prime is 66672259. The next prime is 66672401. The reversal of 66672269 is 96227666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50951044 + 15721225 = 7138^2 + 3965^2 .

It is a cyclic number.

It is not a de Polignac number, because 66672269 - 2⁸ = 66672013 is a prime.

It is a super-2 number, since 2×66672269² = 8890382907216722, 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 (66672259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33336134 + 33336135.

It is an arithmetic number, because the mean of its divisors is an integer number (33336135).

Almost surely, 2^66672269 is an apocalyptic number.

It is an amenable number.

66672269 is a deficient number, since it is larger than the sum of its proper divisors (1).

66672269 is an equidigital number, since it uses as much as digits as its factorization.

66672269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 44.

The square root of 66672269 is about 8165.3088735210. The cubic root of 66672269 is about 405.4914908944.

The spelling of 66672269 in words is "sixty-six million, six hundred seventy-two thousand, two hundred sixty-nine".