2149666577 has 2 divisors, whose sum is σ = 2149666578. Its totient is φ = 2149666576.

The previous prime is 2149666559. The next prime is 2149666583. The reversal of 2149666577 is 7756669412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1982119441 + 167547136 = 44521^2 + 12944^2 .

It is a cyclic number.

It is not a de Polignac number, because 2149666577 - 2¹⁴ = 2149650193 is a prime.

It is not a weakly prime, because it can be changed into another prime (2149666537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1074833288 + 1074833289.

It is an arithmetic number, because the mean of its divisors is an integer number (1074833289).

Almost surely, 2^2149666577 is an apocalyptic number.

It is an amenable number.

2149666577 is a deficient number, since it is larger than the sum of its proper divisors (1).

2149666577 is an equidigital number, since it uses as much as digits as its factorization.

2149666577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3810240, while the sum is 53.

The square root of 2149666577 is about 46364.4969453999. The cubic root of 2149666577 is about 1290.5961583582.

The spelling of 2149666577 in words is "two billion, one hundred forty-nine million, six hundred sixty-six thousand, five hundred seventy-seven".