7890288066 has 12 divisors (see below), whose sum is σ = 17095624182. Its totient is φ = 2630096016.

The previous prime is 7890288037. The next prime is 7890288067. The reversal of 7890288066 is 6608820987.

It can be written as a sum of positive squares in only one way, i.e., 4465580625 + 3424707441 = 66825^2 + 58521^2 .

It is not an unprimeable number, because it can be changed into a prime (7890288067) 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 in 5 ways as a sum of consecutive naturals, for example, 219174651 + ... + 219174686.

Almost surely, 2^7890288066 is an apocalyptic number.

7890288066 is an abundant number, since it is smaller than the sum of its proper divisors (9205336116).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7890288066 is a wasteful number, since it uses less digits than its factorization.

7890288066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438349345 (or 438349342 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The square root of 7890288066 is about 88827.2934744721. The cubic root of 7890288066 is about 1990.8152233413.

The spelling of 7890288066 in words is "seven billion, eight hundred ninety million, two hundred eighty-eight thousand, sixty-six".