66042212574 has 64 divisors (see below), whose sum is σ = 147819571200. Its totient is φ = 19533087360.

The previous prime is 66042212563. The next prime is 66042212591. The reversal of 66042212574 is 47521224066.

66042212574 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (39).

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 31 ways as a sum of consecutive naturals, for example, 268629 + ... + 451935.

It is an arithmetic number, because the mean of its divisors is an integer number (2309680800).

Almost surely, 2^66042212574 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66042212574, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73909785600).

66042212574 is an abundant number, since it is smaller than the sum of its proper divisors (81777358626).

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

66042212574 is a wasteful number, since it uses less digits than its factorization.

66042212574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183505.

The product of its (nonzero) digits is 161280, while the sum is 39.

The spelling of 66042212574 in words is "sixty-six billion, forty-two million, two hundred twelve thousand, five hundred seventy-four".