852812661 has 4 divisors (see below), whose sum is σ = 1137083552. Its totient is φ = 568541772.

The previous prime is 852812629. The next prime is 852812671. The reversal of 852812661 is 166218258.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 852812661 - 2⁵ = 852812629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (852812671) 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 3 ways as a sum of consecutive naturals, for example, 142135441 + ... + 142135446.

It is an arithmetic number, because the mean of its divisors is an integer number (284270888).

Almost surely, 2^852812661 is an apocalyptic number.

It is an amenable number.

852812661 is a deficient number, since it is larger than the sum of its proper divisors (284270891).

852812661 is a wasteful number, since it uses less digits than its factorization.

852812661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284270890.

The product of its digits is 46080, while the sum is 39.

The square root of 852812661 is about 29202.9563743125. The cubic root of 852812661 is about 948.3119277877.

The spelling of 852812661 in words is "eight hundred fifty-two million, eight hundred twelve thousand, six hundred sixty-one".