49666813 has 16 divisors (see below), whose sum is σ = 57796480. Its totient is φ = 41803776.

The previous prime is 49666811. The next prime is 49666819. The reversal of 49666813 is 31866694.

It is not a de Polignac number, because 49666813 - 2¹ = 49666811 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 49666813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49666811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130858 + ... + 131236.

It is an arithmetic number, because the mean of its divisors is an integer number (3612280).

Almost surely, 2^49666813 is an apocalyptic number.

It is an amenable number.

49666813 is a deficient number, since it is larger than the sum of its proper divisors (8129667).

49666813 is a wasteful number, since it uses less digits than its factorization.

49666813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676.

The product of its digits is 186624, while the sum is 43.

The square root of 49666813 is about 7047.4685526081. The cubic root of 49666813 is about 367.5830111583.

The spelling of 49666813 in words is "forty-nine million, six hundred sixty-six thousand, eight hundred thirteen".