66767166 has 96 divisors (see below), whose sum is σ = 159344640. Its totient is φ = 20925216.

The previous prime is 66767131. The next prime is 66767189. The reversal of 66767166 is 66176766.

Its product of digits (381024) is a multiple of the sum of its prime divisors (168).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 845115 + ... + 845193.

It is an arithmetic number, because the mean of its divisors is an integer number (1659840).

Almost surely, 2^66767166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66767166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79672320).

66767166 is an abundant number, since it is smaller than the sum of its proper divisors (92577474).

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

66767166 is a wasteful number, since it uses less digits than its factorization.

66767166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180 (or 168 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The square root of 66767166 is about 8171.1177937905. The cubic root of 66767166 is about 405.6837831542.

The spelling of 66767166 in words is "sixty-six million, seven hundred sixty-seven thousand, one hundred sixty-six".