4149668665 has 4 divisors (see below), whose sum is σ = 4979602404. Its totient is φ = 3319734928.

The previous prime is 4149668657. The next prime is 4149668687. The reversal of 4149668665 is 5668669414.

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

It can be written as a sum of positive squares in 2 ways, for example, as 954253881 + 3195414784 = 30891^2 + 56528^2 .

It is a cyclic number.

It is not a de Polignac number, because 4149668665 - 2³ = 4149668657 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 414966862 + ... + 414966871.

It is an arithmetic number, because the mean of its divisors is an integer number (1244900601).

Almost surely, 2^4149668665 is an apocalyptic number.

It is an amenable number.

4149668665 is a deficient number, since it is larger than the sum of its proper divisors (829933739).

4149668665 is an equidigital number, since it uses as much as digits as its factorization.

4149668665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829933738.

The product of its digits is 7464960, while the sum is 55.

The square root of 4149668665 is about 64417.9219239491. The cubic root of 4149668665 is about 1606.9578066424.

The spelling of 4149668665 in words is "four billion, one hundred forty-nine million, six hundred sixty-eight thousand, six hundred sixty-five".