64078660 has 12 divisors (see below), whose sum is σ = 134565228. Its totient is φ = 25631456.

The previous prime is 64078649. The next prime is 64078699. The reversal of 64078660 is 6687046.

It can be written as a sum of positive squares in 2 ways, for example, as 24740676 + 39337984 = 4974^2 + 6272^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1601947 + ... + 1601986.

It is an arithmetic number, because the mean of its divisors is an integer number (11213769).

Almost surely, 2^64078660 is an apocalyptic number.

It is an amenable number.

64078660 is an abundant number, since it is smaller than the sum of its proper divisors (70486568).

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

64078660 is a wasteful number, since it uses less digits than its factorization.

64078660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3203942 (or 3203940 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 64078660 is about 8004.9147403330. The cubic root of 64078660 is about 400.1638079083.

The spelling of 64078660 in words is "sixty-four million, seventy-eight thousand, six hundred sixty".