66565098 has 64 divisors (see below), whose sum is σ = 159408000. Its totient is φ = 20512512.

The previous prime is 66565097. The next prime is 66565111. The reversal of 66565098 is 89056566.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66565097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53548 + ... + 54776.

It is an arithmetic number, because the mean of its divisors is an integer number (2490750).

Almost surely, 2^66565098 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66565098, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79704000).

66565098 is an abundant number, since it is smaller than the sum of its proper divisors (92842902).

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

66565098 is a wasteful number, since it uses less digits than its factorization.

66565098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1316 (or 1310 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The square root of 66565098 is about 8158.7436532839. The cubic root of 66565098 is about 405.2741079920.

The spelling of 66565098 in words is "sixty-six million, five hundred sixty-five thousand, ninety-eight".