6665522 has 4 divisors (see below), whose sum is σ = 9998286. Its totient is φ = 3332760.

The previous prime is 6665497. The next prime is 6665537. The reversal of 6665522 is 2255666.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 5340721 + 1324801 = 2311^2 + 1151^2 .

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1666379 + ... + 1666382.

Almost surely, 2^6665522 is an apocalyptic number.

6665522 is a deficient number, since it is larger than the sum of its proper divisors (3332764).

6665522 is a wasteful number, since it uses less digits than its factorization.

6665522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3332763.

The product of its digits is 21600, while the sum is 32.

The square root of 6665522 is about 2581.7672242090. The cubic root of 6665522 is about 188.1964334339.

The spelling of 6665522 in words is "six million, six hundred sixty-five thousand, five hundred twenty-two".