65678985 has 16 divisors (see below), whose sum is σ = 116762880. Its totient is φ = 35028720.

The previous prime is 65678983. The next prime is 65678993. The reversal of 65678985 is 58987656.

It is not a de Polignac number, because 65678985 - 2¹ = 65678983 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (65678983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 243121 + ... + 243390.

It is an arithmetic number, because the mean of its divisors is an integer number (7297680).

Almost surely, 2^65678985 is an apocalyptic number.

It is an amenable number.

65678985 is a deficient number, since it is larger than the sum of its proper divisors (51083895).

65678985 is a wasteful number, since it uses less digits than its factorization.

65678985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486525 (or 486519 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 54.

The square root of 65678985 is about 8104.2572145756. The cubic root of 65678985 is about 403.4677355664.

The spelling of 65678985 in words is "sixty-five million, six hundred seventy-eight thousand, nine hundred eighty-five".