1272784066 has 8 divisors (see below), whose sum is σ = 1909370700. Its totient is φ = 636327168.

The previous prime is 1272784057. The next prime is 1272784069. The reversal of 1272784066 is 6604872721.

It can be written as a sum of positive squares in 2 ways, for example, as 1171076841 + 101707225 = 34221^2 + 10085^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1272784069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2311 + ... + 50506.

Almost surely, 2^1272784066 is an apocalyptic number.

1272784066 is a deficient number, since it is larger than the sum of its proper divisors (636586634).

1272784066 is a wasteful number, since it uses less digits than its factorization.

1272784066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64868.

The product of its (nonzero) digits is 225792, while the sum is 43.

The square root of 1272784066 is about 35676.0993663825. The cubic root of 1272784066 is about 1083.7228819409.

The spelling of 1272784066 in words is "one billion, two hundred seventy-two million, seven hundred eighty-four thousand, sixty-six".