66788068 has 12 divisors (see below), whose sum is σ = 118037052. Its totient is φ = 33063200.

The previous prime is 66788063. The next prime is 66788069. The reversal of 66788068 is 86088766.

It can be written as a sum of positive squares in 2 ways, for example, as 27123264 + 39664804 = 5208^2 + 6298^2 .

It is not an unprimeable number, because it can be changed into a prime (66788063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82255 + ... + 83062.

It is an arithmetic number, because the mean of its divisors is an integer number (9836421).

Almost surely, 2^66788068 is an apocalyptic number.

It is an amenable number.

66788068 is a deficient number, since it is larger than the sum of its proper divisors (51248984).

66788068 is a wasteful number, since it uses less digits than its factorization.

66788068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165422 (or 165420 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 49.

The square root of 66788068 is about 8172.3967108799. The cubic root of 66788068 is about 405.7261129311.

The spelling of 66788068 in words is "sixty-six million, seven hundred eighty-eight thousand, sixty-eight".