66610104 has 64 divisors (see below), whose sum is σ = 182753280. Its totient is φ = 20064000.

The previous prime is 66610087. The next prime is 66610111. The reversal of 66610104 is 40101666.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49764 + ... + 51084.

It is an arithmetic number, because the mean of its divisors is an integer number (2855520).

Almost surely, 2^66610104 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 66610104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91376640).

66610104 is an abundant number, since it is smaller than the sum of its proper divisors (116143176).

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

66610104 is a wasteful number, since it uses less digits than its factorization.

66610104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1532 (or 1528 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 66610104 is about 8161.5013324755. The cubic root of 66610104 is about 405.3654254032.

The spelling of 66610104 in words is "sixty-six million, six hundred ten thousand, one hundred four".