49666981 has 8 divisors (see below), whose sum is σ = 61128704. Its totient is φ = 39296880.

The previous prime is 49666961. The next prime is 49666997. The reversal of 49666981 is 18966694.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 49666981 - 2¹¹ = 49664933 is a prime.

It is a super-2 number, since 2×49666981² = 4933618003308722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49666901) 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 in 7 ways as a sum of consecutive naturals, for example, 272805 + ... + 272986.

It is an arithmetic number, because the mean of its divisors is an integer number (7641088).

Almost surely, 2^49666981 is an apocalyptic number.

It is an amenable number.

49666981 is a deficient number, since it is larger than the sum of its proper divisors (11461723).

49666981 is a wasteful number, since it uses less digits than its factorization.

49666981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545811.

The product of its digits is 559872, while the sum is 49.

The square root of 49666981 is about 7047.4804717715. The cubic root of 49666981 is about 367.5834256127.

The spelling of 49666981 in words is "forty-nine million, six hundred sixty-six thousand, nine hundred eighty-one".