2687668 has 6 divisors (see below), whose sum is σ = 4703426. Its totient is φ = 1343832.

The previous prime is 2687653. The next prime is 2687677. The reversal of 2687668 is 8667862.

It can be written as a sum of positive squares in only one way, i.e., 2683044 + 4624 = 1638^2 + 68^2 .

It is a nialpdrome in base 12.

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, 335955 + ... + 335962.

2^2687668 is an apocalyptic number.

It is an amenable number.

2687668 is a deficient number, since it is larger than the sum of its proper divisors (2015758).

2687668 is a wasteful number, since it uses less digits than its factorization.

2687668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671921 (or 671919 counting only the distinct ones).

The product of its digits is 193536, while the sum is 43.

The square root of 2687668 is about 1639.4108697944. The cubic root of 2687668 is about 139.0353411508.

The spelling of 2687668 in words is "two million, six hundred eighty-seven thousand, six hundred sixty-eight".