66700370740340 has 96 divisors (see below), whose sum is σ = 151948008856224. Its totient is φ = 24494973501440.

The previous prime is 66700370740337. The next prime is 66700370740453. The reversal of 66700370740340 is 4304707300766.

It can be written as a sum of positive squares in 16 ways, for example, as 10360905194896 + 56339465545444 = 3218836^2 + 7505962^2 .

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, 104468714 + ... + 105105246.

It is an arithmetic number, because the mean of its divisors is an integer number (1582791758919).

Almost surely, 2^{66700370740340} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66700370740340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75974004428112).

66700370740340 is an abundant number, since it is smaller than the sum of its proper divisors (85247638115884).

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

66700370740340 is a wasteful number, since it uses less digits than its factorization.

66700370740340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644117 (or 644115 counting only the distinct ones).

The product of its (nonzero) digits is 1778112, while the sum is 47.

The spelling of 66700370740340 in words is "sixty-six trillion, seven hundred billion, three hundred seventy million, seven hundred forty thousand, three hundred forty".