66159456 has 192 divisors, whose sum is σ = 204374016. Its totient is φ = 18547200.

The previous prime is 66159451. The next prime is 66159479. The reversal of 66159456 is 65495166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66159451) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1407625 + ... + 1407671.

It is an arithmetic number, because the mean of its divisors is an integer number (1064448).

Almost surely, 2^66159456 is an apocalyptic number.

66159456 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66159456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102187008).

66159456 is an abundant number, since it is smaller than the sum of its proper divisors (138214560).

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

66159456 is a wasteful number, since it uses less digits than its factorization.

66159456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 137 counting only the distinct ones).

The product of its digits is 194400, while the sum is 42.

The square root of 66159456 is about 8133.8463226201. The cubic root of 66159456 is about 404.4491948437.

The spelling of 66159456 in words is "sixty-six million, one hundred fifty-nine thousand, four hundred fifty-six".