66940104 has 192 divisors, whose sum is σ = 218332800. Its totient is φ = 16727040.

The previous prime is 66940103. The next prime is 66940109. The reversal of 66940104 is 40104966.

It is not an unprimeable number, because it can be changed into a prime (66940103) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 752092 + ... + 752180.

It is an arithmetic number, because the mean of its divisors is an integer number (1137150).

Almost surely, 2^66940104 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 66940104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109166400).

66940104 is an abundant number, since it is smaller than the sum of its proper divisors (151392696).

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

66940104 is a wasteful number, since it uses less digits than its factorization.

66940104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164 (or 149 counting only the distinct ones).

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

The square root of 66940104 is about 8181.6932232882. The cubic root of 66940104 is about 406.0337438688.

The spelling of 66940104 in words is "sixty-six million, nine hundred forty thousand, one hundred four".