812066670 has 48 divisors (see below), whose sum is σ = 2112888960. Its totient is φ = 216395712.

The previous prime is 812066617. The next prime is 812066683. The reversal of 812066670 is 76660218.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 180387 + ... + 184833.

It is an arithmetic number, because the mean of its divisors is an integer number (44018520).

Almost surely, 2^812066670 is an apocalyptic number.

812066670 is an abundant number, since it is smaller than the sum of its proper divisors (1300822290).

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

812066670 is a wasteful number, since it uses less digits than its factorization.

812066670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6489 (or 6486 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 812066670 is about 28496.7835027043. The cubic root of 812066670 is about 932.9618715959.

The spelling of 812066670 in words is "eight hundred twelve million, sixty-six thousand, six hundred seventy".