64411866 has 12 divisors (see below), whose sum is σ = 139559082. Its totient is φ = 21470616.

The previous prime is 64411859. The next prime is 64411873. The reversal of 64411866 is 66811446.

64411866 is a `hidden beast` number, since 644 + 1 + 1 + 8 + 6 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (64411859) and next prime (64411873).

It can be written as a sum of positive squares in only one way, i.e., 58752225 + 5659641 = 7665^2 + 2379^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 64411866.

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, 1789201 + ... + 1789236.

Almost surely, 2^64411866 is an apocalyptic number.

64411866 is an abundant number, since it is smaller than the sum of its proper divisors (75147216).

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

64411866 is a wasteful number, since it uses less digits than its factorization.

64411866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3578445 (or 3578442 counting only the distinct ones).

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

The square root of 64411866 is about 8025.7003432722. The cubic root of 64411866 is about 400.8562200769.

The spelling of 64411866 in words is "sixty-four million, four hundred eleven thousand, eight hundred sixty-six".