6663156 has 48 divisors (see below), whose sum is σ = 16511040. Its totient is φ = 2087680.

The previous prime is 6663121. The next prime is 6663179. The reversal of 6663156 is 6513666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14035 + ... + 14501.

It is an arithmetic number, because the mean of its divisors is an integer number (343980).

Almost surely, 2^6663156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6663156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8255520).

6663156 is an abundant number, since it is smaller than the sum of its proper divisors (9847884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6663156 is a wasteful number, since it uses less digits than its factorization.

6663156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544 (or 542 counting only the distinct ones).

The product of its digits is 19440, while the sum is 33.

The square root of 6663156 is about 2581.3089702707. The cubic root of 6663156 is about 188.1741633373.

The spelling of 6663156 in words is "six million, six hundred sixty-three thousand, one hundred fifty-six".