66897936 has 180 divisors, whose sum is σ = 229710000. Its totient is φ = 18071424.

The previous prime is 66897931. The next prime is 66897949. The reversal of 66897936 is 63979866.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (66897931) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 133815 + ... + 134313.

Almost surely, 2^66897936 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 66897936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114855000).

66897936 is an abundant number, since it is smaller than the sum of its proper divisors (162812064).

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

66897936 is a wasteful number, since it uses less digits than its factorization.

66897936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546 (or 530 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 54.

The square root of 66897936 is about 8179.1158446375. The cubic root of 66897936 is about 405.9484674982.

The spelling of 66897936 in words is "sixty-six million, eight hundred ninety-seven thousand, nine hundred thirty-six".