66061751501777 has 8 divisors (see below), whose sum is σ = 66180755232000. Its totient is φ = 65942749209744.

The previous prime is 66061751501761. The next prime is 66061751501807. The reversal of 66061751501777 is 77710515716066.

66061751501777 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66061751501777 - 2⁴ = 66061751501761 is a prime.

It is a super-2 number, since 2×66061751501777² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66061751501717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142884224 + ... + 143345822.

It is an arithmetic number, because the mean of its divisors is an integer number (8272594404000).

Almost surely, 2^{66061751501777} is an apocalyptic number.

It is an amenable number.

66061751501777 is a deficient number, since it is larger than the sum of its proper divisors (119003730223).

66061751501777 is a wasteful number, since it uses less digits than its factorization.

66061751501777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719095.

The product of its (nonzero) digits is 12965400, while the sum is 59.

The spelling of 66061751501777 in words is "sixty-six trillion, sixty-one billion, seven hundred fifty-one million, five hundred one thousand, seven hundred seventy-seven".