66748355384766 has 32 divisors (see below), whose sum is σ = 145640967383808. Its totient is φ = 20225636581440.

The previous prime is 66748355384731. The next prime is 66748355384869.

66748355384766 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 66748355384691 and 66748355384700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27261871 + ... + 29609226.

It is an arithmetic number, because the mean of its divisors is an integer number (4551280230744).

Almost surely, 2^{66748355384766} is an apocalyptic number.

66748355384766 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

66748355384766 is an abundant number, since it is smaller than the sum of its proper divisors (78892611999042).

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

66748355384766 is a wasteful number, since it uses less digits than its factorization.

66748355384766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56888896.

The product of its digits is 14631321600, while the sum is 78.

The spelling of 66748355384766 in words is "sixty-six trillion, seven hundred forty-eight billion, three hundred fifty-five million, three hundred eighty-four thousand, seven hundred sixty-six".