853257866 has 4 divisors (see below), whose sum is σ = 1279886802. Its totient is φ = 426628932.

The previous prime is 853257859. The next prime is 853257869. The reversal of 853257866 is 668752358.

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., 541911841 + 311346025 = 23279^2 + 17645^2 .

It is not an unprimeable number, because it can be changed into a prime (853257869) 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 as a sum of consecutive naturals, namely, 213314465 + ... + 213314468.

Almost surely, 2^853257866 is an apocalyptic number.

853257866 is a deficient number, since it is larger than the sum of its proper divisors (426628936).

853257866 is a wasteful number, since it uses less digits than its factorization.

853257866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426628935.

The product of its digits is 2419200, while the sum is 50.

The square root of 853257866 is about 29210.5779812725. The cubic root of 853257866 is about 948.4769189925.

The spelling of 853257866 in words is "eight hundred fifty-three million, two hundred fifty-seven thousand, eight hundred sixty-six".