64316660 has 12 divisors (see below), whose sum is σ = 135065028. Its totient is φ = 25726656.

The previous prime is 64316657. The next prime is 64316663. The reversal of 64316660 is 6661346.

It is an interprime number because it is at equal distance from previous prime (64316657) and next prime (64316663).

It can be written as a sum of positive squares in 2 ways, for example, as 16679056 + 47637604 = 4084^2 + 6902^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64316663) 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, 1607897 + ... + 1607936.

It is an arithmetic number, because the mean of its divisors is an integer number (11255419).

Almost surely, 2^64316660 is an apocalyptic number.

It is an amenable number.

64316660 is an abundant number, since it is smaller than the sum of its proper divisors (70748368).

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

64316660 is a wasteful number, since it uses less digits than its factorization.

64316660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3215842 (or 3215840 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 64316660 is about 8019.7668295282. The cubic root of 64316660 is about 400.6586232766.

The spelling of 64316660 in words is "sixty-four million, three hundred sixteen thousand, six hundred sixty".