64688722 has 24 divisors (see below), whose sum is σ = 113399676. Its totient is φ = 27595008.

The previous prime is 64688681. The next prime is 64688737. The reversal of 64688722 is 22788646.

64688722 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 2 ways, for example, as 61795321 + 2893401 = 7861^2 + 1701^2 .

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 21418 + ... + 24250.

Almost surely, 2^64688722 is an apocalyptic number.

64688722 is a deficient number, since it is larger than the sum of its proper divisors (48710954).

64688722 is a wasteful number, since it uses less digits than its factorization.

64688722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3082 (or 3075 counting only the distinct ones).

The product of its digits is 258048, while the sum is 43.

The square root of 64688722 is about 8042.9299387723. The cubic root of 64688722 is about 401.4297211550.

The spelling of 64688722 in words is "sixty-four million, six hundred eighty-eight thousand, seven hundred twenty-two".