849876903866 has 4 divisors (see below), whose sum is σ = 1274815355802. Its totient is φ = 424938451932.

The previous prime is 849876903853. The next prime is 849876903871. The reversal of 849876903866 is 668309678948.

It is a happy number.

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., 578024157841 + 271852746025 = 760279^2 + 521395^2 .

It is a junction number, because it is equal to n+sod(n) for n = 849876903793 and 849876903802.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212469225965 + ... + 212469225968.

Almost surely, 2^849876903866 is an apocalyptic number.

849876903866 is a deficient number, since it is larger than the sum of its proper divisors (424938451936).

849876903866 is a wasteful number, since it uses less digits than its factorization.

849876903866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424938451935.

The product of its (nonzero) digits is 752467968, while the sum is 74.

The spelling of 849876903866 in words is "eight hundred forty-nine billion, eight hundred seventy-six million, nine hundred three thousand, eight hundred sixty-six".