66162798 has 48 divisors (see below), whose sum is σ = 158855760. Its totient is φ = 20291472.

The previous prime is 66162797. The next prime is 66162799. The reversal of 66162798 is 89726166.

66162798 is a `hidden beast` number, since 6 + 616 + 27 + 9 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (66162797) and next prime (66162799).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66162791) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 215361 + ... + 215667.

It is an arithmetic number, because the mean of its divisors is an integer number (3309495).

Almost surely, 2^66162798 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66162798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79427880).

66162798 is an abundant number, since it is smaller than the sum of its proper divisors (92692962).

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

66162798 is a wasteful number, since it uses less digits than its factorization.

66162798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638 (or 325 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 66162798 is about 8134.0517578879. The cubic root of 66162798 is about 404.4560048879.

The spelling of 66162798 in words is "sixty-six million, one hundred sixty-two thousand, seven hundred ninety-eight".