166276232640 has 336 divisors, whose sum is σ = 674711132160. Its totient is φ = 36779857920.

The previous prime is 166276232611. The next prime is 166276232699. The reversal of 166276232640 is 46232672661.

166276232640 is a `hidden beast` number, since 16 + 6 + 2 + 7 + 623 + 2 + 6 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (336).

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 491931 + ... + 757989.

Almost surely, 2^166276232640 is an apocalyptic number.

166276232640 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 166276232640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (337355566080).

166276232640 is an abundant number, since it is smaller than the sum of its proper divisors (508434899520).

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

166276232640 is a wasteful number, since it uses less digits than its factorization.

166276232640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266120 (or 266107 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 45.

The spelling of 166276232640 in words is "one hundred sixty-six billion, two hundred seventy-six million, two hundred thirty-two thousand, six hundred forty".