1668960277 has 2 divisors, whose sum is σ = 1668960278. Its totient is φ = 1668960276.

The previous prime is 1668960257. The next prime is 1668960283. The reversal of 1668960277 is 7720698661.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1667823921 + 1136356 = 40839^2 + 1066^2 .

It is a cyclic number.

It is not a de Polignac number, because 1668960277 - 2²³ = 1660571669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1668960217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834480138 + 834480139.

It is an arithmetic number, because the mean of its divisors is an integer number (834480139).

Almost surely, 2^1668960277 is an apocalyptic number.

It is an amenable number.

1668960277 is a deficient number, since it is larger than the sum of its proper divisors (1).

1668960277 is an equidigital number, since it uses as much as digits as its factorization.

1668960277 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1524096, while the sum is 52.

The square root of 1668960277 is about 40852.9102635296. The cubic root of 1668960277 is about 1186.1747273489.

The spelling of 1668960277 in words is "one billion, six hundred sixty-eight million, nine hundred sixty thousand, two hundred seventy-seven".