849666531 has 16 divisors (see below), whose sum is σ = 1295449344. Its totient is φ = 485253984.

The previous prime is 849666527. The next prime is 849666539. The reversal of 849666531 is 135666948.

849666531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 849666531 - 2² = 849666527 is a prime.

It is a super-2 number, since 2×849666531² = 1443866427803147922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (849666539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31180 + ... + 51686.

It is an arithmetic number, because the mean of its divisors is an integer number (80965584).

Almost surely, 2^849666531 is an apocalyptic number.

849666531 is a deficient number, since it is larger than the sum of its proper divisors (445782813).

849666531 is a wasteful number, since it uses less digits than its factorization.

849666531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22490.

The product of its digits is 933120, while the sum is 48.

The square root of 849666531 is about 29149.0399670384. The cubic root of 849666531 is about 947.1443446723.

The spelling of 849666531 in words is "eight hundred forty-nine million, six hundred sixty-six thousand, five hundred thirty-one".