65663430 has 96 divisors (see below), whose sum is σ = 193052160. Its totient is φ = 14212800.

The previous prime is 65663393. The next prime is 65663431. The reversal of 65663430 is 3436656.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 65663391 and 65663400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65663431) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26755 + ... + 29105.

It is an arithmetic number, because the mean of its divisors is an integer number (2010960).

Almost surely, 2^65663430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65663430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96526080).

65663430 is an abundant number, since it is smaller than the sum of its proper divisors (127388730).

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

65663430 is a wasteful number, since it uses less digits than its factorization.

65663430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2394 (or 2387 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 33.

The square root of 65663430 is about 8103.2974769534. The cubic root of 65663430 is about 403.4358814599.

The spelling of 65663430 in words is "sixty-five million, six hundred sixty-three thousand, four hundred thirty".