66328070067021 has 32 divisors (see below), whose sum is σ = 112649176949760. Its totient is φ = 33794753078016.

The previous prime is 66328070066969. The next prime is 66328070067037. The reversal of 66328070067021 is 12076007082366.

It is not a de Polignac number, because 66328070067021 - 2⁹ = 66328070066509 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66328070065021) 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, 4889280411 + ... + 4889293976.

It is an arithmetic number, because the mean of its divisors is an integer number (3520286779680).

Almost surely, 2^{66328070067021} is an apocalyptic number.

It is an amenable number.

66328070067021 is a deficient number, since it is larger than the sum of its proper divisors (46321106882739).

66328070067021 is a wasteful number, since it uses less digits than its factorization.

66328070067021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9778574433.

The product of its (nonzero) digits is 1016064, while the sum is 48.

The spelling of 66328070067021 in words is "sixty-six trillion, three hundred twenty-eight billion, seventy million, sixty-seven thousand, twenty-one".