6660534 has 8 divisors (see below), whose sum is σ = 13321080. Its totient is φ = 2220176.

The previous prime is 6660523. The next prime is 6660551. The reversal of 6660534 is 4350666.

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

6660534 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555039 + ... + 555050.

It is an arithmetic number, because the mean of its divisors is an integer number (1665135).

Almost surely, 2^6660534 is an apocalyptic number.

6660534 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.

6660534 is a wasteful number, since it uses less digits than its factorization.

6660534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110094.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 6660534 is about 2580.8010384375. The cubic root of 6660534 is about 188.1494774683.

The spelling of 6660534 in words is "six million, six hundred sixty thousand, five hundred thirty-four".