2421158666 has 16 divisors (see below), whose sum is σ = 3855699144. Its totient is φ = 1136308224.

The previous prime is 2421158659. The next prime is 2421158681. The reversal of 2421158666 is 6668511242.

It can be written as a sum of positive squares in 4 ways, for example, as 2225858041 + 195300625 = 47179^2 + 13975^2 .

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, 82775 + ... + 108138.

Almost surely, 2^2421158666 is an apocalyptic number.

2421158666 is a deficient number, since it is larger than the sum of its proper divisors (1434540478).

2421158666 is a wasteful number, since it uses less digits than its factorization.

2421158666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191305.

The product of its digits is 138240, while the sum is 41.

The square root of 2421158666 is about 49205.2707136136. The cubic root of 2421158666 is about 1342.7889241024.

The spelling of 2421158666 in words is "two billion, four hundred twenty-one million, one hundred fifty-eight thousand, six hundred sixty-six".