2207866 has 4 divisors (see below), whose sum is σ = 3311802. Its totient is φ = 1103932.

The previous prime is 2207861. The next prime is 2207873. The reversal of 2207866 is 6687022.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6687022 = 2 ⋅3343511.

It can be written as a sum of positive squares in only one way, i.e., 2030625 + 177241 = 1425^2 + 421^2 .

It is not an unprimeable number, because it can be changed into a prime (2207861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 551965 + ... + 551968.

2^2207866 is an apocalyptic number.

2207866 is a deficient number, since it is larger than the sum of its proper divisors (1103936).

2207866 is a wasteful number, since it uses less digits than its factorization.

2207866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1103935.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 2207866 is about 1485.8889595121. Note that the first 3 decimals coincide. The cubic root of 2207866 is about 130.2139671646.

The spelling of 2207866 in words is "two million, two hundred seven thousand, eight hundred sixty-six".