2666428 has 6 divisors (see below), whose sum is σ = 4666256. Its totient is φ = 1333212.

The previous prime is 2666423. The next prime is 2666429. The reversal of 2666428 is 8246662.

It is a junction number, because it is equal to n+sod(n) for n = 2666393 and 2666402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666423) 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 as a sum of consecutive naturals, namely, 333300 + ... + 333307.

2^2666428 is an apocalyptic number.

It is an amenable number.

2666428 is a deficient number, since it is larger than the sum of its proper divisors (1999828).

2666428 is a wasteful number, since it uses less digits than its factorization.

2666428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666611 (or 666609 counting only the distinct ones).

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

The square root of 2666428 is about 1632.9200837763. The cubic root of 2666428 is about 138.6681176911.

The spelling of 2666428 in words is "two million, six hundred sixty-six thousand, four hundred twenty-eight".