4449911666 has 8 divisors (see below), whose sum is σ = 6743680860. Its totient is φ = 2202018048.

The previous prime is 4449911639. The next prime is 4449911677. The reversal of 4449911666 is 6661199444.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3736754641 + 713157025 = 61129^2 + 26705^2 .

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

It is a zygodrome in base 10.

It is an unprimeable number.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11468651 + ... + 11469038.

Almost surely, 2^4449911666 is an apocalyptic number.

4449911666 is a deficient number, since it is larger than the sum of its proper divisors (2293769194).

4449911666 is a wasteful number, since it uses less digits than its factorization.

4449911666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22937788.

The product of its digits is 1119744, while the sum is 50.

The square root of 4449911666 is about 66707.6582260238. The cubic root of 4449911666 is about 1644.8152730301.

It can be divided in two parts, 44499 and 11666, that added together give a palindrome (56165).

The spelling of 4449911666 in words is "four billion, four hundred forty-nine million, nine hundred eleven thousand, six hundred sixty-six".