1966240277 has 2 divisors, whose sum is σ = 1966240278. Its totient is φ = 1966240276.

The previous prime is 1966240219. The next prime is 1966240291. The reversal of 1966240277 is 7720426691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1963464721 + 2775556 = 44311^2 + 1666^2 .

It is an emirp because it is prime and its reverse (7720426691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1966240277 - 2²⁸ = 1697804821 is a prime.

It is a super-2 number, since 2×1966240277² = 7732201653794073458, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1966240217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 983120138 + 983120139.

It is an arithmetic number, because the mean of its divisors is an integer number (983120139).

Almost surely, 2^1966240277 is an apocalyptic number.

It is an amenable number.

1966240277 is a deficient number, since it is larger than the sum of its proper divisors (1).

1966240277 is an equidigital number, since it uses as much as digits as its factorization.

1966240277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 1966240277 is about 44342.3079800770. The cubic root of 1966240277 is about 1252.7916863085.

The spelling of 1966240277 in words is "one billion, nine hundred sixty-six million, two hundred forty thousand, two hundred seventy-seven".