66016255620068 has 96 divisors (see below), whose sum is σ = 125963882684640. Its totient is φ = 30091404902400.

The previous prime is 66016255620067. The next prime is 66016255620097. The reversal of 66016255620068 is 86002655261066.

It can be written as a sum of positive squares in 16 ways, for example, as 11497850159104 + 54518405460964 = 3390848^2 + 7383658^2 .

It is not an unprimeable number, because it can be changed into a prime (66016255620067) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3461231780 + ... + 3461250852.

It is an arithmetic number, because the mean of its divisors is an integer number (1312123777965).

Almost surely, 2^{66016255620068} is an apocalyptic number.

It is an amenable number.

66016255620068 is a deficient number, since it is larger than the sum of its proper divisors (59947627064572).

66016255620068 is a wasteful number, since it uses less digits than its factorization.

66016255620068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20817 (or 20815 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 53.

The spelling of 66016255620068 in words is "sixty-six trillion, sixteen billion, two hundred fifty-five million, six hundred twenty thousand, sixty-eight".