64681704 has 96 divisors (see below), whose sum is σ = 184766400. Its totient is φ = 20401920.

The previous prime is 64681699. The next prime is 64681711. The reversal of 64681704 is 40718646.

64681704 is a `hidden beast` number, since 646 + 8 + 1 + 7 + 0 + 4 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 230044 + ... + 230324.

It is an arithmetic number, because the mean of its divisors is an integer number (1924650).

Almost surely, 2^64681704 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 64681704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92383200).

64681704 is an abundant number, since it is smaller than the sum of its proper divisors (120084696).

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

64681704 is a wasteful number, since it uses less digits than its factorization.

64681704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455 (or 448 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 64681704 is about 8042.4936431433. The cubic root of 64681704 is about 401.4152037575.

The spelling of 64681704 in words is "sixty-four million, six hundred eighty-one thousand, seven hundred four".