64787506 has 12 divisors (see below), whose sum is σ = 113047758. Its totient is φ = 27766032.

The previous prime is 64787501. The next prime is 64787507. The reversal of 64787506 is 60578746.

64787506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 57896881 + 6890625 = 7609^2 + 2625^2 .

It is not an unprimeable number, because it can be changed into a prime (64787501) 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 5 ways as a sum of consecutive naturals, for example, 330451 + ... + 330646.

Almost surely, 2^64787506 is an apocalyptic number.

64787506 is a deficient number, since it is larger than the sum of its proper divisors (48260252).

64787506 is a wasteful number, since it uses less digits than its factorization.

64787506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661113 (or 661106 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 43.

The square root of 64787506 is about 8049.0686417746. The cubic root of 64787506 is about 401.6339538984.

The spelling of 64787506 in words is "sixty-four million, seven hundred eighty-seven thousand, five hundred six".