851274166 has 4 divisors (see below), whose sum is σ = 1276911252. Its totient is φ = 425637082.

The previous prime is 851274163. The next prime is 851274187. The reversal of 851274166 is 661472158.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851274161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212818540 + ... + 212818543.

It is an arithmetic number, because the mean of its divisors is an integer number (319227813).

Almost surely, 2^851274166 is an apocalyptic number.

851274166 is a deficient number, since it is larger than the sum of its proper divisors (425637086).

851274166 is a wasteful number, since it uses less digits than its factorization.

851274166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425637085.

The product of its digits is 80640, while the sum is 40.

The square root of 851274166 is about 29176.6030579298. The cubic root of 851274166 is about 947.7413251815.

The spelling of 851274166 in words is "eight hundred fifty-one million, two hundred seventy-four thousand, one hundred sixty-six".