65680547 has 4 divisors (see below), whose sum is σ = 66010800. Its totient is φ = 65350296.

The previous prime is 65680523. The next prime is 65680561. The reversal of 65680547 is 74508656.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65680547 - 2¹⁴ = 65664163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65680567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164828 + ... + 165225.

It is an arithmetic number, because the mean of its divisors is an integer number (16502700).

Almost surely, 2^65680547 is an apocalyptic number.

65680547 is a deficient number, since it is larger than the sum of its proper divisors (330253).

65680547 is a wasteful number, since it uses less digits than its factorization.

65680547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330252.

The product of its (nonzero) digits is 201600, while the sum is 41.

The square root of 65680547 is about 8104.3535831058. The cubic root of 65680547 is about 403.4709340101.

The spelling of 65680547 in words is "sixty-five million, six hundred eighty thousand, five hundred forty-seven".