66220265615574 has 16 divisors (see below), whose sum is σ = 151360607121408. Its totient is φ = 18920075890152.

The previous prime is 66220265615561. The next prime is 66220265615591. The reversal of 66220265615574 is 47551656202266.

66220265615574 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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, 788336495382 + ... + 788336495465.

It is an arithmetic number, because the mean of its divisors is an integer number (9460037945088).

Almost surely, 2^{66220265615574} is an apocalyptic number.

66220265615574 is an abundant number, since it is smaller than the sum of its proper divisors (85140341505834).

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

66220265615574 is a wasteful number, since it uses less digits than its factorization.

66220265615574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1576672990859.

The product of its (nonzero) digits is 36288000, while the sum is 57.

The spelling of 66220265615574 in words is "sixty-six trillion, two hundred twenty billion, two hundred sixty-five million, six hundred fifteen thousand, five hundred seventy-four".