66745454766 has 32 divisors (see below), whose sum is σ = 137813203968. Its totient is φ = 21528270720.

The previous prime is 66745454747. The next prime is 66745454767.

66745454766 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×66745454766² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66745454767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2202630 + ... + 2232726.

It is an arithmetic number, because the mean of its divisors is an integer number (4306662624).

Almost surely, 2^66745454766 is an apocalyptic number.

66745454766 is an abundant number, since it is smaller than the sum of its proper divisors (71067749202).

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

66745454766 is a wasteful number, since it uses less digits than its factorization.

66745454766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42056.

The product of its digits is 101606400, while the sum is 60.

The spelling of 66745454766 in words is "sixty-six billion, seven hundred forty-five million, four hundred fifty-four thousand, seven hundred sixty-six".