660798281026 has 32 divisors (see below), whose sum is σ = 1071591721200. Its totient is φ = 303800647680.

The previous prime is 660798280981. The next prime is 660798281047. The reversal of 660798281026 is 620182897066.

It is a Cunningham number, because it is equal to 812895²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 155989452025 + 504808829001 = 394955^2 + 710499^2 .

It is a super-2 number, since 2×660798281026² (a number of 24 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 7735186 + ... + 7820146.

Almost surely, 2^660798281026 is an apocalyptic number.

660798281026 is a deficient number, since it is larger than the sum of its proper divisors (410793440174).

660798281026 is a wasteful number, since it uses less digits than its factorization.

660798281026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86134.

The product of its (nonzero) digits is 3483648, while the sum is 55.

The spelling of 660798281026 in words is "six hundred sixty billion, seven hundred ninety-eight million, two hundred eighty-one thousand, twenty-six".