666040144470737 has 16 divisors (see below), whose sum is σ = 683261480082384. Its totient is φ = 648865506432000.

The previous prime is 666040144470707. The next prime is 666040144470793. The reversal of 666040144470737 is 737074441040666.

It is a happy number.

666040144470737 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 280065044700736 + 385975099770001 = 16735144^2 + 19646249^2 .

It is a cyclic number.

It is not a de Polignac number, because 666040144470737 - 2⁴⁰ = 664940632842961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666040144470707) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266491943 + ... + 268979619.

It is an arithmetic number, because the mean of its divisors is an integer number (42703842505149).

Almost surely, 2^{666040144470737} is an apocalyptic number.

It is an amenable number.

666040144470737 is a deficient number, since it is larger than the sum of its proper divisors (17221335611647).

666040144470737 is a wasteful number, since it uses less digits than its factorization.

666040144470737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2497060.

The product of its (nonzero) digits is 56899584, while the sum is 59.

The spelling of 666040144470737 in words is "six hundred sixty-six trillion, forty billion, one hundred forty-four million, four hundred seventy thousand, seven hundred thirty-seven".