1966766149 has 2 divisors, whose sum is σ = 1966766150. Its totient is φ = 1966766148.

The previous prime is 1966766119. The next prime is 1966766267. The reversal of 1966766149 is 9416676691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1952756100 + 14010049 = 44190^2 + 3743^2 .

It is an emirp because it is prime and its reverse (9416676691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1966766149 - 2¹¹ = 1966764101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1966766149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1966766119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 983383074 + 983383075.

It is an arithmetic number, because the mean of its divisors is an integer number (983383075).

Almost surely, 2^1966766149 is an apocalyptic number.

It is an amenable number.

1966766149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1966766149 is an equidigital number, since it uses as much as digits as its factorization.

1966766149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2939328, while the sum is 55.

The square root of 1966766149 is about 44348.2372704936. The cubic root of 1966766149 is about 1252.9033629524.

The spelling of 1966766149 in words is "one billion, nine hundred sixty-six million, seven hundred sixty-six thousand, one hundred forty-nine".