65217864 has 16 divisors (see below), whose sum is σ = 163044720. Its totient is φ = 21739280.

The previous prime is 65217847. The next prime is 65217869. The reversal of 65217864 is 46871256.

It is not an unprimeable number, because it can be changed into a prime (65217869) 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, 1358682 + ... + 1358729.

It is an arithmetic number, because the mean of its divisors is an integer number (10190295).

Almost surely, 2^65217864 is an apocalyptic number.

It is an amenable number.

65217864 is an abundant number, since it is smaller than the sum of its proper divisors (97826856).

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

65217864 is a wasteful number, since it uses less digits than its factorization.

65217864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2717420 (or 2717416 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The square root of 65217864 is about 8075.7577972596. The cubic root of 65217864 is about 402.5212910050.

The spelling of 65217864 in words is "sixty-five million, two hundred seventeen thousand, eight hundred sixty-four".