6660533616156 has 240 divisors, whose sum is σ = 21101976403200. Its totient is φ = 1788343183872.

The previous prime is 6660533616133. The next prime is 6660533616211. The reversal of 6660533616156 is 6516163350666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 25277335 + ... + 25539473.

It is an arithmetic number, because the mean of its divisors is an integer number (87924901680).

Almost surely, 2^{6660533616156} 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 6660533616156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10550988201600).

6660533616156 is an abundant number, since it is smaller than the sum of its proper divisors (14441442787044).

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

6660533616156 is a wasteful number, since it uses less digits than its factorization.

6660533616156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262838 (or 262827 counting only the distinct ones).

The product of its (nonzero) digits is 10497600, while the sum is 54.

The spelling of 6660533616156 in words is "six trillion, six hundred sixty billion, five hundred thirty-three million, six hundred sixteen thousand, one hundred fifty-six".