49999666 has 8 divisors (see below), whose sum is σ = 75842460. Its totient is φ = 24718848.

The previous prime is 49999643. The next prime is 49999667. The reversal of 49999666 is 66699994.

It can be written as a sum of positive squares in 2 ways, for example, as 49999041 + 625 = 7071^2 + 25^2 .

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

It is a super-2 number, since 2×49999666² = 4999933200223112, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 49999666.

It is not an unprimeable number, because it can be changed into a prime (49999667) 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 3 ways as a sum of consecutive naturals, for example, 140271 + ... + 140626.

Almost surely, 2^49999666 is an apocalyptic number.

49999666 is a deficient number, since it is larger than the sum of its proper divisors (25842794).

49999666 is a wasteful number, since it uses less digits than its factorization.

49999666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280988.

The product of its digits is 5668704, while the sum is 58.

The square root of 49999666 is about 7071.0441944595. The cubic root of 49999666 is about 368.4023295512.

The spelling of 49999666 in words is "forty-nine million, nine hundred ninety-nine thousand, six hundred sixty-six".