66144090 has 64 divisors (see below), whose sum is σ = 166738176. Its totient is φ = 16760832.

The previous prime is 66144077. The next prime is 66144101. The reversal of 66144090 is 9044166.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 177144 + ... + 177516.

It is an arithmetic number, because the mean of its divisors is an integer number (2605284).

Almost surely, 2^66144090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66144090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83369088).

66144090 is an abundant number, since it is smaller than the sum of its proper divisors (100594086).

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

66144090 is a wasteful number, since it uses less digits than its factorization.

66144090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 66144090 is about 8132.9016961968. The cubic root of 66144090 is about 404.4178803605.

The spelling of 66144090 in words is "sixty-six million, one hundred forty-four thousand, ninety".