6666522 has 8 divisors (see below), whose sum is σ = 13333056. Its totient is φ = 2222172.

The previous prime is 6666509. The next prime is 6666523. The reversal of 6666522 is 2256666.

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

6666522 is an admirable number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (6666523) 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, 555538 + ... + 555549.

It is an arithmetic number, because the mean of its divisors is an integer number (1666632).

Almost surely, 2^6666522 is an apocalyptic number.

6666522 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.

6666522 is a wasteful number, since it uses less digits than its factorization.

6666522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111092.

The product of its digits is 25920, while the sum is 33.

The square root of 6666522 is about 2581.9608827401. The cubic root of 6666522 is about 188.2058444009.

The spelling of 6666522 in words is "six million, six hundred sixty-six thousand, five hundred twenty-two".