166947111936 has 484 divisors, whose sum is σ = 548278207344. Its totient is φ = 50388480000.

The previous prime is 166947111889. The next prime is 166947111937. The reversal of 166947111936 is 639111749661.

166947111936 is a `hidden beast` number, since 16 + 69 + 471 + 11 + 93 + 6 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (166947111937) by changing a digit.

It is a polite number, since it can be written in 43 ways as a sum of consecutive naturals, for example, 665127811 + ... + 665128061.

Almost surely, 2^166947111936 is an apocalyptic number.

166947111936 is a gapful number since it is divisible by the number (16) 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 166947111936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274139103672).

166947111936 is an abundant number, since it is smaller than the sum of its proper divisors (381331095408).

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

166947111936 is an frugal number, since it uses more digits than its factorization.

166947111936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312 (or 267 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 54.

The spelling of 166947111936 in words is "one hundred sixty-six billion, nine hundred forty-seven million, one hundred eleven thousand, nine hundred thirty-six".