2666842 has 8 divisors (see below), whose sum is σ = 4029876. Its totient is φ = 1323552.

The previous prime is 2666819. The next prime is 2666861. The reversal of 2666842 is 2486662.

It can be written as a sum of positive squares in 2 ways, for example, as 2499561 + 167281 = 1581^2 + 409^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2666842² = 14224092505928, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2666798 and 2666807.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4593 + ... + 5140.

2^2666842 is an apocalyptic number.

2666842 is a deficient number, since it is larger than the sum of its proper divisors (1363034).

2666842 is a wasteful number, since it uses less digits than its factorization.

2666842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9872.

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

The square root of 2666842 is about 1633.0468456232. The cubic root of 2666842 is about 138.6752940371.

The spelling of 2666842 in words is "two million, six hundred sixty-six thousand, eight hundred forty-two".