49666309 has 16 divisors (see below), whose sum is σ = 63922176. Its totient is φ = 37450800.

The previous prime is 49666307. The next prime is 49666313. The reversal of 49666309 is 90366694.

It is a cyclic number.

It is not a de Polignac number, because 49666309 - 2¹ = 49666307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49666307) 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, 8017 + ... + 12790.

It is an arithmetic number, because the mean of its divisors is an integer number (3995136).

Almost surely, 2^49666309 is an apocalyptic number.

It is an amenable number.

49666309 is a deficient number, since it is larger than the sum of its proper divisors (14255867).

49666309 is a wasteful number, since it uses less digits than its factorization.

49666309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20856.

The product of its (nonzero) digits is 209952, while the sum is 43.

The square root of 49666309 is about 7047.4327949971. The cubic root of 49666309 is about 367.5817677898.

The spelling of 49666309 in words is "forty-nine million, six hundred sixty-six thousand, three hundred nine".