64721060 has 12 divisors (see below), whose sum is σ = 135914268. Its totient is φ = 25888416.

The previous prime is 64721047. The next prime is 64721093. The reversal of 64721060 is 6012746.

64721060 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 50098084 + 14622976 = 7078^2 + 3824^2 .

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 3 ways as a sum of consecutive naturals, for example, 1618007 + ... + 1618046.

It is an arithmetic number, because the mean of its divisors is an integer number (11326189).

Almost surely, 2^64721060 is an apocalyptic number.

It is an amenable number.

64721060 is an abundant number, since it is smaller than the sum of its proper divisors (71193208).

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

64721060 is a wasteful number, since it uses less digits than its factorization.

64721060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3236062 (or 3236060 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 64721060 is about 8044.9400246366. The cubic root of 64721060 is about 401.4966018073.

The spelling of 64721060 in words is "sixty-four million, seven hundred twenty-one thousand, sixty".