66519936 has 192 divisors, whose sum is σ = 223722720. Its totient is φ = 18579456.

The previous prime is 66519923. The next prime is 66519953. The reversal of 66519936 is 63991566.

It is a tau number, because it is divible by the number of its divisors (192).

It is a junction number, because it is equal to n+sod(n) for n = 66519891 and 66519900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 588616 + ... + 588728.

Almost surely, 2^66519936 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 66519936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111861360).

66519936 is an abundant number, since it is smaller than the sum of its proper divisors (157202784).

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

66519936 is a wasteful number, since it uses less digits than its factorization.

66519936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213 (or 198 counting only the distinct ones).

The product of its digits is 262440, while the sum is 45.

The square root of 66519936 is about 8155.9754781387. The cubic root of 66519936 is about 405.1824326712.

The spelling of 66519936 in words is "sixty-six million, five hundred nineteen thousand, nine hundred thirty-six".