65660868 has 240 divisors, whose sum is σ = 225396864. Its totient is φ = 16174080.

The previous prime is 65660863. The next prime is 65660887. The reversal of 65660868 is 86806656.

65660868 is a `hidden beast` number, since 6 + 566 + 0 + 86 + 8 = 666.

It is a super-2 number, since 2×65660868² = 8622699173026848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65660863) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 501163 + ... + 501293.

Almost surely, 2^65660868 is an apocalyptic number.

65660868 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65660868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112698432).

65660868 is an abundant number, since it is smaller than the sum of its proper divisors (159735996).

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

65660868 is a wasteful number, since it uses less digits than its factorization.

65660868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 65660868 is about 8103.1393916185. The cubic root of 65660868 is about 403.4306344187.

The spelling of 65660868 in words is "sixty-five million, six hundred sixty thousand, eight hundred sixty-eight".