66052217072078 has 8 divisors (see below), whose sum is σ = 99078572583480. Its totient is φ = 33026026210920.

The previous prime is 66052217072077. The next prime is 66052217072089. The reversal of 66052217072078 is 87027071225066.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66052217072077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40154708 + ... + 41767271.

It is an arithmetic number, because the mean of its divisors is an integer number (12384821572935).

Almost surely, 2^{66052217072078} is an apocalyptic number.

66052217072078 is a deficient number, since it is larger than the sum of its proper divisors (33026355511402).

66052217072078 is a wasteful number, since it uses less digits than its factorization.

66052217072078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82325122.

The product of its (nonzero) digits is 3951360, while the sum is 53.

The spelling of 66052217072078 in words is "sixty-six trillion, fifty-two billion, two hundred seventeen million, seventy-two thousand, seventy-eight".