66805962012720 has 200 divisors, whose sum is σ = 265173718179744. Its totient is φ = 15269934163968.

The previous prime is 66805962012709. The next prime is 66805962012733. The reversal of 66805962012720 is 2721026950866.

66805962012720 is a `hidden beast` number, since 6 + 6 + 8 + 0 + 5 + 9 + 620 + 1 + 2 + 7 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 736351929 + ... + 736442648.

Almost surely, 2^{66805962012720} is an apocalyptic number.

66805962012720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66805962012720 is an abundant number, since it is smaller than the sum of its proper divisors (198367756167024).

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

66805962012720 is a wasteful number, since it uses less digits than its factorization.

66805962012720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1472794609 (or 1472794594 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 66805962012720 in words is "sixty-six trillion, eight hundred five billion, nine hundred sixty-two million, twelve thousand, seven hundred twenty".