64687370 has 32 divisors (see below), whose sum is σ = 127374336. Its totient is φ = 23457600.

The previous prime is 64687331. The next prime is 64687379. The reversal of 64687370 is 7378646.

64687370 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64687379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58967 + ... + 60053.

It is an arithmetic number, because the mean of its divisors is an integer number (3980448).

Almost surely, 2^64687370 is an apocalyptic number.

64687370 is a deficient number, since it is larger than the sum of its proper divisors (62686966).

64687370 is a wasteful number, since it uses less digits than its factorization.

64687370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1646.

The product of its (nonzero) digits is 169344, while the sum is 41.

The square root of 64687370 is about 8042.8458893603. The cubic root of 64687370 is about 401.4269244967.

The spelling of 64687370 in words is "sixty-four million, six hundred eighty-seven thousand, three hundred seventy".