64668160 has 40 divisors (see below), whose sum is σ = 155058156. Its totient is φ = 25866240.

The previous prime is 64668151. The next prime is 64668161. The reversal of 64668160 is 6186646.

It can be written as a sum of positive squares in 2 ways, for example, as 59721984 + 4946176 = 7728^2 + 2224^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (64668161) 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, 10071 + ... + 15190.

Almost surely, 2^64668160 is an apocalyptic number.

It is an amenable number.

64668160 is an abundant number, since it is smaller than the sum of its proper divisors (90389996).

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

64668160 is an equidigital number, since it uses as much as digits as its factorization.

64668160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25284 (or 25268 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 64668160 is about 8041.6515716611. The cubic root of 64668160 is about 401.3871837421.

The spelling of 64668160 in words is "sixty-four million, six hundred sixty-eight thousand, one hundred sixty".