2666648 has 8 divisors (see below), whose sum is σ = 4999980. Its totient is φ = 1333320.

The previous prime is 2666647. The next prime is 2666659. The reversal of 2666648 is 8466662.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×2666648² = 14222023111808, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166658 + ... + 166673.

2^2666648 is an apocalyptic number.

It is an amenable number.

2666648 is a deficient number, since it is larger than the sum of its proper divisors (2333332).

2666648 is a wasteful number, since it uses less digits than its factorization.

2666648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333337 (or 333333 counting only the distinct ones).

The product of its digits is 82944, while the sum is 38.

The square root of 2666648 is about 1632.9874463694. The cubic root of 2666648 is about 138.6719313008.

It can be divided in two parts, 266664 and 8, that multiplied together give a palindrome (2133312).

The spelling of 2666648 in words is "two million, six hundred sixty-six thousand, six hundred forty-eight".