2489939666 has 16 divisors (see below), whose sum is σ = 3748306968. Its totient is φ = 1240512000.

The previous prime is 2489939611. The next prime is 2489939677. The reversal of 2489939666 is 6669399842.

2489939666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 962302441 + 1527637225 = 31021^2 + 39085^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2489939599 and 2489939608.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1094306 + ... + 1096578.

Almost surely, 2^2489939666 is an apocalyptic number.

2489939666 is a deficient number, since it is larger than the sum of its proper divisors (1258367302).

2489939666 is a wasteful number, since it uses less digits than its factorization.

2489939666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3997.

The product of its digits is 30233088, while the sum is 62.

The square root of 2489939666 is about 49899.2952455243. The cubic root of 2489939666 is about 1355.3858309490.

The spelling of 2489939666 in words is "two billion, four hundred eighty-nine million, nine hundred thirty-nine thousand, six hundred sixty-six".