2066667257 has 2 divisors, whose sum is σ = 2066667258. Its totient is φ = 2066667256.

The previous prime is 2066667217. The next prime is 2066667269. The reversal of 2066667257 is 7527666602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1771652281 + 295014976 = 42091^2 + 17176^2 .

It is a cyclic number.

It is not a de Polignac number, because 2066667257 - 2¹⁶ = 2066601721 is a prime.

It is a super-2 number, since 2×2066667257² = 8542227102311808098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2066667217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1033333628 + 1033333629.

It is an arithmetic number, because the mean of its divisors is an integer number (1033333629).

Almost surely, 2^2066667257 is an apocalyptic number.

It is an amenable number.

2066667257 is a deficient number, since it is larger than the sum of its proper divisors (1).

2066667257 is an equidigital number, since it uses as much as digits as its factorization.

2066667257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1270080, while the sum is 47.

The square root of 2066667257 is about 45460.6121494201. The cubic root of 2066667257 is about 1273.7675661372.

The spelling of 2066667257 in words is "two billion, sixty-six million, six hundred sixty-seven thousand, two hundred fifty-seven".