68064784 has 10 divisors (see below), whose sum is σ = 131875550. Its totient is φ = 34032384.

The previous prime is 68064781. The next prime is 68064791. The reversal of 68064784 is 48746086.

It can be written as a sum of positive squares in only one way, i.e., 51840000 + 16224784 = 7200^2 + 4028^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 68064784.

It is not an unprimeable number, because it can be changed into a prime (68064781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2127009 + ... + 2127040.

It is an arithmetic number, because the mean of its divisors is an integer number (13187555).

Almost surely, 2^68064784 is an apocalyptic number.

It is an amenable number.

68064784 is a deficient number, since it is larger than the sum of its proper divisors (63810766).

68064784 is a wasteful number, since it uses less digits than its factorization.

68064784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4254057 (or 4254051 counting only the distinct ones).

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

The square root of 68064784 is about 8250.1384230812. The cubic root of 68064784 is about 408.2950896109.

The spelling of 68064784 in words is "sixty-eight million, sixty-four thousand, seven hundred eighty-four".