851066 has 4 divisors (see below), whose sum is σ = 1276602. Its totient is φ = 425532.

The previous prime is 851057. The next prime is 851087. The reversal of 851066 is 660158.

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., 819025 + 32041 = 905^2 + 179^2 .

It is a Curzon number.

It is an unprimeable number.

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, 212765 + ... + 212768.

2⁸⁵¹⁰⁶⁶ is an apocalyptic number.

851066 is a deficient number, since it is larger than the sum of its proper divisors (425536).

851066 is a wasteful number, since it uses less digits than its factorization.

851066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425535.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 851066 is about 922.5323842554. The cubic root of 851066 is about 94.7664067031.

The spelling of 851066 in words is "eight hundred fifty-one thousand, sixty-six".