66016255620066 has 16 divisors (see below), whose sum is σ = 132065363368800. Its totient is φ = 21999943185248.

The previous prime is 66016255620053. The next prime is 66016255620067. The reversal of 66016255620066 is 66002655261066.

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 7 ways as a sum of consecutive naturals, for example, 1368812571 + ... + 1368860798.

It is an arithmetic number, because the mean of its divisors is an integer number (8254085210550).

Almost surely, 2^{66016255620066} is an apocalyptic number.

66016255620066 is an abundant number, since it is smaller than the sum of its proper divisors (66049107748734).

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

66016255620066 is a wasteful number, since it uses less digits than its factorization.

66016255620066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2737677393.

The product of its (nonzero) digits is 4665600, while the sum is 51.

The spelling of 66016255620066 in words is "sixty-six trillion, sixteen billion, two hundred fifty-five million, six hundred twenty thousand, sixty-six".