65680785 has 48 divisors (see below), whose sum is σ = 118609920. Its totient is φ = 33586560.

The previous prime is 65680781. The next prime is 65680787. The reversal of 65680785 is 58708656.

65680785 is a `hidden beast` number, since 6 + 568 + 0 + 7 + 85 = 666.

It is not a de Polignac number, because 65680785 - 2² = 65680781 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 65680785.

It is not an unprimeable number, because it can be changed into a prime (65680781) 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, 274696 + ... + 274934.

It is an arithmetic number, because the mean of its divisors is an integer number (2471040).

Almost surely, 2^65680785 is an apocalyptic number.

It is an amenable number.

65680785 is a deficient number, since it is larger than the sum of its proper divisors (52929135).

65680785 is a wasteful number, since it uses less digits than its factorization.

65680785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478 (or 475 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The square root of 65680785 is about 8104.3682665585. The cubic root of 65680785 is about 403.4714213485.

The spelling of 65680785 in words is "sixty-five million, six hundred eighty thousand, seven hundred eighty-five".