64680318 has 12 divisors (see below), whose sum is σ = 140140728. Its totient is φ = 21560100.

The previous prime is 64680307. The next prime is 64680349. The reversal of 64680318 is 81308646.

It is a happy number.

64680318 is a `hidden beast` number, since 646 + 8 + 0 + 3 + 1 + 8 = 666.

It is a super-2 number, since 2×64680318² = 8367087073162248, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1796658 + ... + 1796693.

It is an arithmetic number, because the mean of its divisors is an integer number (11678394).

Almost surely, 2^64680318 is an apocalyptic number.

64680318 is an abundant number, since it is smaller than the sum of its proper divisors (75460410).

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

64680318 is a wasteful number, since it uses less digits than its factorization.

64680318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3593359 (or 3593356 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 64680318 is about 8042.4074753770. The cubic root of 64680318 is about 401.4123365611.

The spelling of 64680318 in words is "sixty-four million, six hundred eighty thousand, three hundred eighteen".