811258066 has 4 divisors (see below), whose sum is σ = 1216887102. Its totient is φ = 405629032.

The previous prime is 811258061. The next prime is 811258073. The reversal of 811258066 is 660852118.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 677508841 + 133749225 = 26029^2 + 11565^2 .

It is not an unprimeable number, because it can be changed into a prime (811258061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202814515 + ... + 202814518.

Almost surely, 2^811258066 is an apocalyptic number.

811258066 is a deficient number, since it is larger than the sum of its proper divisors (405629036).

811258066 is a wasteful number, since it uses less digits than its factorization.

811258066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405629035.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 811258066 is about 28482.5923328618. The cubic root of 811258066 is about 932.6521075248.

The spelling of 811258066 in words is "eight hundred eleven million, two hundred fifty-eight thousand, sixty-six".