2666438 has 4 divisors (see below), whose sum is σ = 3999660. Its totient is φ = 1333218.

The previous prime is 2666429. The next prime is 2666453. The reversal of 2666438 is 8346662.

It is a semiprime because it is the product of two primes.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2666398 and 2666407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 666608 + ... + 666611.

It is an arithmetic number, because the mean of its divisors is an integer number (999915).

2^2666438 is an apocalyptic number.

2666438 is a deficient number, since it is larger than the sum of its proper divisors (1333222).

2666438 is a wasteful number, since it uses less digits than its factorization.

2666438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333221.

The product of its digits is 41472, while the sum is 35.

The square root of 2666438 is about 1632.9231457726. The cubic root of 2666438 is about 138.6682910415.

The spelling of 2666438 in words is "two million, six hundred sixty-six thousand, four hundred thirty-eight".