66200016545766 has 20 divisors (see below), whose sum is σ = 148337074112172. Its totient is φ = 22066672181868.

The previous prime is 66200016545737. The next prime is 66200016545813. The reversal of 66200016545766 is 66754561000266.

66200016545766 is a `hidden beast` number, since 6 + 6 + 2 + 0 + 0 + 0 + 1 + 65 + 4 + 576 + 6 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 204321038560 + ... + 204321038883.

Almost surely, 2^{66200016545766} is an apocalyptic number.

66200016545766 is an abundant number, since it is smaller than the sum of its proper divisors (82137057566406).

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

66200016545766 is a wasteful number, since it uses less digits than its factorization.

66200016545766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408642077457 (or 408642077448 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 54.

The spelling of 66200016545766 in words is "sixty-six trillion, two hundred billion, sixteen million, five hundred forty-five thousand, seven hundred sixty-six".