66413696 has 64 divisors (see below), whose sum is σ = 146292480. Its totient is φ = 29872128.

The previous prime is 66413657. The next prime is 66413707. The reversal of 66413696 is 69631466.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49385 + ... + 50711.

It is an arithmetic number, because the mean of its divisors is an integer number (2285820).

Almost surely, 2^66413696 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 66413696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73146240).

66413696 is an abundant number, since it is smaller than the sum of its proper divisors (79878784).

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

66413696 is a wasteful number, since it uses less digits than its factorization.

66413696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381 (or 1369 counting only the distinct ones).

The product of its digits is 139968, while the sum is 41.

The square root of 66413696 is about 8149.4598594017. The cubic root of 66413696 is about 404.9666100604.

The spelling of 66413696 in words is "sixty-six million, four hundred thirteen thousand, six hundred ninety-six".