64775412 has 72 divisors (see below), whose sum is σ = 179302760. Its totient is φ = 19595520.

The previous prime is 64775411. The next prime is 64775437. The reversal of 64775412 is 21457746.

64775412 is a `hidden beast` number, since 647 + 7 + 5 + 4 + 1 + 2 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 9511056 + 55264356 = 3084^2 + 7434^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64775411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27414 + ... + 29682.

Almost surely, 2^64775412 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 64775412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89651380).

64775412 is an abundant number, since it is smaller than the sum of its proper divisors (114527348).

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

64775412 is a wasteful number, since it uses less digits than its factorization.

64775412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2353 (or 2348 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 64775412 is about 8048.3173396680. The cubic root of 64775412 is about 401.6089610996.

The spelling of 64775412 in words is "sixty-four million, seven hundred seventy-five thousand, four hundred twelve".