65663429 has 6 divisors (see below), whose sum is σ = 71103186. Its totient is φ = 60612240.

The previous prime is 65663393. The next prime is 65663431. The reversal of 65663429 is 92436656.

It can be written as a sum of positive squares in 3 ways, for example, as 21025 + 65642404 = 145^2 + 8102^2 .

It is not a de Polignac number, because 65663429 - 2¹⁶ = 65597893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65663489) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 194102 + ... + 194439.

It is an arithmetic number, because the mean of its divisors is an integer number (11850531).

Almost surely, 2^65663429 is an apocalyptic number.

It is an amenable number.

65663429 is a deficient number, since it is larger than the sum of its proper divisors (5439757).

65663429 is a wasteful number, since it uses less digits than its factorization.

65663429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388567 (or 388554 counting only the distinct ones).

The product of its digits is 233280, while the sum is 41.

The square root of 65663429 is about 8103.2974152502. The cubic root of 65663429 is about 403.4358794119.

The spelling of 65663429 in words is "sixty-five million, six hundred sixty-three thousand, four hundred twenty-nine".