66671356034020 has 24 divisors (see below), whose sum is σ = 143793897610104. Its totient is φ = 25947770996736.

The previous prime is 66671356033999. The next prime is 66671356034039. The reversal of 66671356034020 is 2043065317666.

It can be written as a sum of positive squares in 4 ways, for example, as 30126332652516 + 36545023381504 = 5488746^2 + 6045248^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45048212797 + ... + 45048214276.

It is an arithmetic number, because the mean of its divisors is an integer number (5991412400421).

Almost surely, 2^{66671356034020} is an apocalyptic number.

It is an amenable number.

66671356034020 is an abundant number, since it is smaller than the sum of its proper divisors (77122541576084).

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

66671356034020 is a wasteful number, since it uses less digits than its factorization.

66671356034020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90096427119 (or 90096427117 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 49.

The spelling of 66671356034020 in words is "sixty-six trillion, six hundred seventy-one billion, three hundred fifty-six million, thirty-four thousand, twenty".