2126664421 has 8 divisors (see below), whose sum is σ = 2431869440. Its totient is φ = 1821808368.

The previous prime is 2126664367. The next prime is 2126664427. The reversal of 2126664421 is 1244666212.

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

It is a cyclic number.

It is not a de Polignac number, because 2126664421 - 2²⁷ = 1992446693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2126664427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74046 + ... + 98671.

It is an arithmetic number, because the mean of its divisors is an integer number (303983680).

Almost surely, 2^2126664421 is an apocalyptic number.

It is an amenable number.

2126664421 is a deficient number, since it is larger than the sum of its proper divisors (305205019).

2126664421 is a wasteful number, since it uses less digits than its factorization.

2126664421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174483.

The product of its digits is 27648, while the sum is 34.

The square root of 2126664421 is about 46115.7719332551. The cubic root of 2126664421 is about 1285.9763700895.

The spelling of 2126664421 in words is "two billion, one hundred twenty-six million, six hundred sixty-four thousand, four hundred twenty-one".