2666667 has 8 divisors (see below), whose sum is σ = 3608896. Its totient is φ = 1751112.

The previous prime is 2666663. The next prime is 2666683. The reversal of 2666667 is 7666662.

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

It is not a de Polignac number, because 2666667 - 2² = 2666663 is a prime.

It is a super-2 number, since 2×2666667² = 14222225777778, which contains 22 as substring.

It is a Duffinian number.

2666667 is a lucky number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (2666663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6433 + ... + 6834.

It is an arithmetic number, because the mean of its divisors is an integer number (451112).

2^2666667 is an apocalyptic number.

2666667 is a deficient number, since it is larger than the sum of its proper divisors (942229).

2666667 is a wasteful number, since it uses less digits than its factorization.

2666667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13337.

The product of its digits is 108864, while the sum is 39.

The square root of 2666667 is about 1632.9932639175. The cubic root of 2666667 is about 138.6722606481.

It can be divided in two parts, 2666 and 667, that added together give a palindrome (3333).

The spelling of 2666667 in words is "two million, six hundred sixty-six thousand, six hundred sixty-seven".