49131666 has 48 divisors (see below), whose sum is σ = 113297184. Its totient is φ = 15334272.

The previous prime is 49131661. The next prime is 49131679. The reversal of 49131666 is 66613194.

49131666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 49131666.

It is not an unprimeable number, because it can be changed into a prime (49131661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93681 + ... + 94203.

It is an arithmetic number, because the mean of its divisors is an integer number (2360358).

Almost surely, 2^49131666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49131666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56648592).

49131666 is an abundant number, since it is smaller than the sum of its proper divisors (64165518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

49131666 is a wasteful number, since it uses less digits than its factorization.

49131666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855 (or 852 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 49131666 is about 7009.3984049988. The cubic root of 49131666 is about 366.2580371527.

The spelling of 49131666 in words is "forty-nine million, one hundred thirty-one thousand, six hundred sixty-six".