2666658 has 8 divisors (see below), whose sum is σ = 5333328. Its totient is φ = 888884.

The previous prime is 2666647. The next prime is 2666659. The reversal of 2666658 is 8566662.

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

2666658 is an admirable number.

It is a super-2 number, since 2×2666658² = 14222129777928, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2666659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222216 + ... + 222227.

It is an arithmetic number, because the mean of its divisors is an integer number (666666).

2^2666658 is an apocalyptic number.

2666658 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2666658 is a wasteful number, since it uses less digits than its factorization.

2666658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444448.

The product of its digits is 103680, while the sum is 39.

The square root of 2666658 is about 1632.9905082394. The cubic root of 2666658 is about 138.6721046417.

The spelling of 2666658 in words is "two million, six hundred sixty-six thousand, six hundred fifty-eight".