1860666149 has 2 divisors, whose sum is σ = 1860666150. Its totient is φ = 1860666148.

The previous prime is 1860666131. The next prime is 1860666161. The reversal of 1860666149 is 9416660681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1844101249 + 16564900 = 42943^2 + 4070^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1860666149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1860366149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 930333074 + 930333075.

It is an arithmetic number, because the mean of its divisors is an integer number (930333075).

Almost surely, 2^1860666149 is an apocalyptic number.

It is an amenable number.

1860666149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1860666149 is an equidigital number, since it uses as much as digits as its factorization.

1860666149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 1860666149 is about 43135.4395943753. The cubic root of 1860666149 is about 1229.9557454278.

The spelling of 1860666149 in words is "one billion, eight hundred sixty million, six hundred sixty-six thousand, one hundred forty-nine".