64674816 has 88 divisors (see below), whose sum is σ = 177352080. Its totient is φ = 20938752.

The previous prime is 64674811. The next prime is 64674829. The reversal of 64674816 is 61847646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64674811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113380 + ... + 113948.

Almost surely, 2^64674816 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 64674816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88676040).

64674816 is an abundant number, since it is smaller than the sum of its proper divisors (112677264).

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

64674816 is a wasteful number, since it uses less digits than its factorization.

64674816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629 (or 611 counting only the distinct ones).

The product of its digits is 193536, while the sum is 42.

The square root of 64674816 is about 8042.0654063493. The cubic root of 64674816 is about 401.4009542562.

The spelling of 64674816 in words is "sixty-four million, six hundred seventy-four thousand, eight hundred sixteen".