676642069 has 2 divisors, whose sum is σ = 676642070. Its totient is φ = 676642068.

The previous prime is 676642039. The next prime is 676642081. The reversal of 676642069 is 960246676.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 450500625 + 226141444 = 21225^2 + 15038^2 .

It is a cyclic number.

It is not a de Polignac number, because 676642069 - 2¹³ = 676633877 is a prime.

It is a super-2 number, since 2×676642069² = 915688979081201522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (676642009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338321034 + 338321035.

It is an arithmetic number, because the mean of its divisors is an integer number (338321035).

Almost surely, 2^676642069 is an apocalyptic number.

It is an amenable number.

676642069 is a deficient number, since it is larger than the sum of its proper divisors (1).

676642069 is an equidigital number, since it uses as much as digits as its factorization.

676642069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 46.

The square root of 676642069 is about 26012.3445502323. The cubic root of 676642069 is about 877.9160697095.

The spelling of 676642069 in words is "six hundred seventy-six million, six hundred forty-two thousand, sixty-nine".