1251163066 has 16 divisors (see below), whose sum is σ = 1993935240. Its totient is φ = 587684160.

The previous prime is 1251163031. The next prime is 1251163073. The reversal of 1251163066 is 6603611521.

It can be written as a sum of positive squares in 4 ways, for example, as 1241082441 + 10080625 = 35229^2 + 3175^2 .

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 289365 + ... + 293656.

Almost surely, 2^1251163066 is an apocalyptic number.

1251163066 is a deficient number, since it is larger than the sum of its proper divisors (742772174).

1251163066 is a wasteful number, since it uses less digits than its factorization.

1251163066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583089.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 1251163066 is about 35371.7834721406. The cubic root of 1251163066 is about 1077.5513414130.

Adding to 1251163066 its reverse (6603611521), we get a palindrome (7854774587).

The spelling of 1251163066 in words is "one billion, two hundred fifty-one million, one hundred sixty-three thousand, sixty-six".