166663949727312 has 240 divisors, whose sum is σ = 473478596787456. Its totient is φ = 54720731520000.

The previous prime is 166663949727221. The next prime is 166663949727437. The reversal of 166663949727312 is 213727949366661.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8196711898 + ... + 8196732230.

Almost surely, 2^{166663949727312} is an apocalyptic number.

166663949727312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166663949727312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236739298393728).

166663949727312 is an abundant number, since it is smaller than the sum of its proper divisors (306814647060144).

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

166663949727312 is a wasteful number, since it uses less digits than its factorization.

166663949727312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23330 (or 23321 counting only the distinct ones).

The product of its digits is 740710656, while the sum is 72.

The spelling of 166663949727312 in words is "one hundred sixty-six trillion, six hundred sixty-three billion, nine hundred forty-nine million, seven hundred twenty-seven thousand, three hundred twelve".