66254902375690 has 96 divisors (see below), whose sum is σ = 147016544889024. Its totient is φ = 21361346818560.

The previous prime is 66254902375687. The next prime is 66254902375721. The reversal of 66254902375690 is 9657320945266.

66254902375690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×66254902375690² (a number of 28 digits) contains 22 as substring.

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 47 ways as a sum of consecutive naturals, for example, 6268285 + ... + 13107295.

It is an arithmetic number, because the mean of its divisors is an integer number (1531422342594).

Almost surely, 2^{66254902375690} is an apocalyptic number.

66254902375690 is an abundant number, since it is smaller than the sum of its proper divisors (80761642513334).

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

66254902375690 is a wasteful number, since it uses less digits than its factorization.

66254902375690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6840212 (or 6840205 counting only the distinct ones).

The product of its (nonzero) digits is 146966400, while the sum is 64.

The spelling of 66254902375690 in words is "sixty-six trillion, two hundred fifty-four billion, nine hundred two million, three hundred seventy-five thousand, six hundred ninety".