66109050 has 144 divisors (see below), whose sum is σ = 209843712. Its totient is φ = 14601600.

The previous prime is 66109031. The next prime is 66109079. The reversal of 66109050 is 5090166.

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 71 ways as a sum of consecutive naturals, for example, 97312 + ... + 97988.

It is an arithmetic number, because the mean of its divisors is an integer number (1457248).

Almost surely, 2^66109050 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66109050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104921856).

66109050 is an abundant number, since it is smaller than the sum of its proper divisors (143734662).

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

66109050 is a wasteful number, since it uses less digits than its factorization.

66109050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733 (or 725 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 66109050 is about 8130.7471981362. The cubic root of 66109050 is about 404.3464539458.

The spelling of 66109050 in words is "sixty-six million, one hundred nine thousand, fifty".