1278322066 has 32 divisors (see below), whose sum is σ = 2230486272. Its totient is φ = 538168320.

The previous prime is 1278322063. The next prime is 1278322069. The reversal of 1278322066 is 6602238721.

It is an interprime number because it is at equal distance from previous prime (1278322063) and next prime (1278322069).

It is not an unprimeable number, because it can be changed into a prime (1278322061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182611 + ... + 189481.

It is an arithmetic number, because the mean of its divisors is an integer number (69702696).

Almost surely, 2^1278322066 is an apocalyptic number.

1278322066 is a deficient number, since it is larger than the sum of its proper divisors (952164206).

1278322066 is a wasteful number, since it uses less digits than its factorization.

1278322066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7114.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 1278322066 is about 35753.6301094029. The cubic root of 1278322066 is about 1085.2924002575.

The spelling of 1278322066 in words is "one billion, two hundred seventy-eight million, three hundred twenty-two thousand, sixty-six".