2666398 has 16 divisors (see below), whose sum is σ = 4635360. Its totient is φ = 1126656.

The previous prime is 2666393. The next prime is 2666423. The reversal of 2666398 is 8936662.

It is a d-powerful number, because it can be written as 2¹¹ + 6² + 6⁷ + 6⁷ + 3⁸ + 9³ + 8⁷ .

It is a self number, because there is not a number n which added to its sum of digits gives 2666398.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666393) 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 7 ways as a sum of consecutive naturals, for example, 283 + ... + 2326.

It is an arithmetic number, because the mean of its divisors is an integer number (289710).

2^2666398 is an apocalyptic number.

2666398 is a deficient number, since it is larger than the sum of its proper divisors (1968962).

2666398 is a wasteful number, since it uses less digits than its factorization.

2666398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2691.

The product of its digits is 93312, while the sum is 40.

The square root of 2666398 is about 1632.9108977528. The cubic root of 2666398 is about 138.6675976372.

The spelling of 2666398 in words is "two million, six hundred sixty-six thousand, three hundred ninety-eight".