166977953280 has 160 divisors (see below), whose sum is σ = 593119850400. Its totient is φ = 44527435776.

The previous prime is 166977953243. The next prime is 166977953291. The reversal of 166977953280 is 82359779661.

166977953280 is a `hidden beast` number, since 1 + 6 + 6 + 97 + 7 + 9 + 532 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (160).

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, 1138765 + ... + 1277004.

It is an arithmetic number, because the mean of its divisors is an integer number (3706999065).

Almost surely, 2^166977953280 is an apocalyptic number.

166977953280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166977953280 is an abundant number, since it is smaller than the sum of its proper divisors (426141897120).

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

166977953280 is an equidigital number, since it uses as much as digits as its factorization.

166977953280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2415801 (or 2415779 counting only the distinct ones).

The product of its (nonzero) digits is 34292160, while the sum is 63.

The spelling of 166977953280 in words is "one hundred sixty-six billion, nine hundred seventy-seven million, nine hundred fifty-three thousand, two hundred eighty".