1966475677 has 2 divisors, whose sum is σ = 1966475678. Its totient is φ = 1966475676.

The previous prime is 1966475611. The next prime is 1966475683. The reversal of 1966475677 is 7765746691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1768538916 + 197936761 = 42054^2 + 14069^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1966475677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1966415677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 983237838 + 983237839.

It is an arithmetic number, because the mean of its divisors is an integer number (983237839).

Almost surely, 2^1966475677 is an apocalyptic number.

It is an amenable number.

1966475677 is a deficient number, since it is larger than the sum of its proper divisors (1).

1966475677 is an equidigital number, since it uses as much as digits as its factorization.

1966475677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13335840, while the sum is 58.

The square root of 1966475677 is about 44344.9622505195. The cubic root of 1966475677 is about 1252.8416794178.

The spelling of 1966475677 in words is "one billion, nine hundred sixty-six million, four hundred seventy-five thousand, six hundred seventy-seven".