49639337666 has 4 divisors (see below), whose sum is σ = 74459006502. Its totient is φ = 24819668832.

The previous prime is 49639337639. The next prime is 49639337669. The reversal of 49639337666 is 66673393694.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 43006049641 + 6633288025 = 207379^2 + 81445^2 .

It is a super-3 number, since 3×49639337666³ (a number of 33 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 49639337599 and 49639337608.

It is not an unprimeable number, because it can be changed into a prime (49639337669) 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 as a sum of consecutive naturals, namely, 12409834415 + ... + 12409834418.

Almost surely, 2^49639337666 is an apocalyptic number.

49639337666 is a deficient number, since it is larger than the sum of its proper divisors (24819668836).

49639337666 is a wasteful number, since it uses less digits than its factorization.

49639337666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24819668835.

The product of its digits is 79361856, while the sum is 62.

The spelling of 49639337666 in words is "forty-nine billion, six hundred thirty-nine million, three hundred thirty-seven thousand, six hundred sixty-six".