66690176 has 96 divisors (see below), whose sum is σ = 160001280. Its totient is φ = 27659520.

The previous prime is 66690163. The next prime is 66690181. The reversal of 66690176 is 67109666.

66690176 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 2151281 + ... + 2151311.

It is an arithmetic number, because the mean of its divisors is an integer number (1666680).

Almost surely, 2^66690176 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66690176, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80000640).

66690176 is an abundant number, since it is smaller than the sum of its proper divisors (93311104).

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

66690176 is an frugal number, since it uses more digits than its factorization.

66690176 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80 (or 40 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 66690176 is about 8166.4053291519. The cubic root of 66690176 is about 405.5277902748.

It can be divided in two parts, 66690 and 176, that added together give a palindrome (66866).

The spelling of 66690176 in words is "sixty-six million, six hundred ninety thousand, one hundred seventy-six".