2166574426 has 8 divisors (see below), whose sum is σ = 3250271124. Its totient is φ = 1083150720.

The previous prime is 2166574387. The next prime is 2166574429. The reversal of 2166574426 is 6244756612.

It can be written as a sum of positive squares in 2 ways, for example, as 2107269025 + 59305401 = 45905^2 + 7701^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2166574429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47095 + ... + 80938.

Almost surely, 2^2166574426 is an apocalyptic number.

2166574426 is a deficient number, since it is larger than the sum of its proper divisors (1083696698).

2166574426 is a wasteful number, since it uses less digits than its factorization.

2166574426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136496.

The product of its digits is 483840, while the sum is 43.

The square root of 2166574426 is about 46546.4759783166. The cubic root of 2166574426 is about 1293.9709830119.

The spelling of 2166574426 in words is "two billion, one hundred sixty-six million, five hundred seventy-four thousand, four hundred twenty-six".