812066368072 has 16 divisors (see below), whose sum is σ = 1528942387500. Its totient is φ = 404348398080.

The previous prime is 812066368067. The next prime is 812066368109. The reversal of 812066368072 is 270863660218.

812066368072 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 800534615076 + 11531752996 = 894726^2 + 107386^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210596197 + ... + 210600052.

Almost surely, 2^812066368072 is an apocalyptic number.

It is an amenable number.

812066368072 is a deficient number, since it is larger than the sum of its proper divisors (716876019428).

812066368072 is a wasteful number, since it uses less digits than its factorization.

812066368072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421196496 (or 421196492 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 49.

The spelling of 812066368072 in words is "eight hundred twelve billion, sixty-six million, three hundred sixty-eight thousand, seventy-two".