166677755580 has 144 divisors (see below), whose sum is σ = 579789572544. Its totient is φ = 37967662080.

The previous prime is 166677755533. The next prime is 166677755591. The reversal of 166677755580 is 85557776661.

166677755580 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×166677755580³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (63).

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, 143440 + ... + 594920.

It is an arithmetic number, because the mean of its divisors is an integer number (4026316476).

Almost surely, 2^166677755580 is an apocalyptic number.

166677755580 is a gapful number since it is divisible by the number (10) 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 166677755580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (289894786272).

166677755580 is an abundant number, since it is smaller than the sum of its proper divisors (413111816964).

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

166677755580 is a wasteful number, since it uses less digits than its factorization.

166677755580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451796 (or 451791 counting only the distinct ones).

The product of its (nonzero) digits is 74088000, while the sum is 63.

The spelling of 166677755580 in words is "one hundred sixty-six billion, six hundred seventy-seven million, seven hundred fifty-five thousand, five hundred eighty".