66045798 has 96 divisors (see below), whose sum is σ = 179280192. Its totient is φ = 17107200.

The previous prime is 66045797. The next prime is 66045803. The reversal of 66045798 is 89754066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66045797) 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, 99588 + ... + 100248.

It is an arithmetic number, because the mean of its divisors is an integer number (1867502).

Almost surely, 2^66045798 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66045798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89640096).

66045798 is an abundant number, since it is smaller than the sum of its proper divisors (113234394).

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

66045798 is a wasteful number, since it uses less digits than its factorization.

66045798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750 (or 747 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 66045798 is about 8126.8565878819. The cubic root of 66045798 is about 404.2174555558.

The spelling of 66045798 in words is "sixty-six million, forty-five thousand, seven hundred ninety-eight".