7801289066 has 16 divisors (see below), whose sum is σ = 12159426048. Its totient is φ = 3749814000.

The previous prime is 7801289051. The next prime is 7801289077. The reversal of 7801289066 is 6609821087.

It is a super-2 number, since 2×7801289066² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7801289066.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 407285 + ... + 426008.

It is an arithmetic number, because the mean of its divisors is an integer number (759964128).

Almost surely, 2^7801289066 is an apocalyptic number.

7801289066 is a deficient number, since it is larger than the sum of its proper divisors (4358136982).

7801289066 is a wasteful number, since it uses less digits than its factorization.

7801289066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833477.

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 7801289066 is about 88324.9062609183. The cubic root of 7801289066 is about 1983.3017273467.

The spelling of 7801289066 in words is "seven billion, eight hundred one million, two hundred eighty-nine thousand, sixty-six".