64680336 has 160 divisors (see below), whose sum is σ = 215819520. Its totient is φ = 18164736.

The previous prime is 64680307. The next prime is 64680349. The reversal of 64680336 is 63308646.

64680336 is a `hidden beast` number, since 646 + 8 + 0 + 3 + 3 + 6 = 666.

It is a super-3 number, since 3×64680336³ (a number of 24 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 64680336.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 220606 + ... + 220898.

It is an arithmetic number, because the mean of its divisors is an integer number (1348872).

Almost surely, 2^64680336 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64680336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107909760).

64680336 is an abundant number, since it is smaller than the sum of its proper divisors (151139184).

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

64680336 is a wasteful number, since it uses less digits than its factorization.

64680336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390 (or 378 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 64680336 is about 8042.4085944448. The cubic root of 64680336 is about 401.4123737977.

The spelling of 64680336 in words is "sixty-four million, six hundred eighty thousand, three hundred thirty-six".