166273776 has 80 divisors (see below), whose sum is σ = 488421120. Its totient is φ = 54129600.

The previous prime is 166273747. The next prime is 166273777. The reversal of 166273776 is 677372661.

166273776 is a `hidden beast` number, since 16 + 627 + 3 + 7 + 7 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166273777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14101 + ... + 23051.

It is an arithmetic number, because the mean of its divisors is an integer number (6105264).

Almost surely, 2^166273776 is an apocalyptic number.

166273776 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 166273776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244210560).

166273776 is an abundant number, since it is smaller than the sum of its proper divisors (322147344).

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

166273776 is a wasteful number, since it uses less digits than its factorization.

166273776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9011 (or 8999 counting only the distinct ones).

The product of its digits is 444528, while the sum is 45.

The square root of 166273776 is about 12894.7189189994. The cubic root of 166273776 is about 549.8884357736. Note that the first 3 decimals are identical.

The spelling of 166273776 in words is "one hundred sixty-six million, two hundred seventy-three thousand, seven hundred seventy-six".