655166069 has 2 divisors, whose sum is σ = 655166070. Its totient is φ = 655166068.

The previous prime is 655166053. The next prime is 655166087. The reversal of 655166069 is 960661556.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 474586225 + 180579844 = 21785^2 + 13438^2 .

It is a cyclic number.

It is not a de Polignac number, because 655166069 - 2⁴ = 655166053 is a prime.

It is a super-2 number, since 2×655166069² = 858485155937825522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (655162069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327583034 + 327583035.

It is an arithmetic number, because the mean of its divisors is an integer number (327583035).

Almost surely, 2^655166069 is an apocalyptic number.

It is an amenable number.

655166069 is a deficient number, since it is larger than the sum of its proper divisors (1).

655166069 is an equidigital number, since it uses as much as digits as its factorization.

655166069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 291600, while the sum is 44.

The square root of 655166069 is about 25596.2120049042. The cubic root of 655166069 is about 868.5279501920.

The spelling of 655166069 in words is "six hundred fifty-five million, one hundred sixty-six thousand, sixty-nine".