6665222 has 4 divisors (see below), whose sum is σ = 9997836. Its totient is φ = 3332610.

The previous prime is 6665213. The next prime is 6665231. The reversal of 6665222 is 2225666.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2225666 = 2 ⋅1112833.

It is an interprime number because it is at equal distance from previous prime (6665213) and next prime (6665231).

It is a nialpdrome in base 10.

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, 1666304 + ... + 1666307.

It is an arithmetic number, because the mean of its divisors is an integer number (2499459).

Almost surely, 2^6665222 is an apocalyptic number.

6665222 is a deficient number, since it is larger than the sum of its proper divisors (3332614).

6665222 is a wasteful number, since it uses less digits than its factorization.

6665222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3332613.

The product of its digits is 8640, while the sum is 29.

The square root of 6665222 is about 2581.7091238170. The cubic root of 6665222 is about 188.1936099603.

The spelling of 6665222 in words is "six million, six hundred sixty-five thousand, two hundred twenty-two".