66740706143461 has 8 divisors (see below), whose sum is σ = 76276164719744. Its totient is φ = 57205515563280.

The previous prime is 66740706143443. The next prime is 66740706143477. The reversal of 66740706143461 is 16434160704766.

It is a happy number.

66740706143461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66740706143461 - 2¹³ = 66740706135269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66740706143431) by changing a digit.

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, 66465090 + ... + 67461763.

It is an arithmetic number, because the mean of its divisors is an integer number (9534520589968).

Almost surely, 2^{66740706143461} is an apocalyptic number.

It is an amenable number.

66740706143461 is a deficient number, since it is larger than the sum of its proper divisors (9535458576283).

66740706143461 is a wasteful number, since it uses less digits than its factorization.

66740706143461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133998051.

The product of its (nonzero) digits is 12192768, while the sum is 55.

The spelling of 66740706143461 in words is "sixty-six trillion, seven hundred forty billion, seven hundred six million, one hundred forty-three thousand, four hundred sixty-one".