666141345750773 has 4 divisors (see below), whose sum is σ = 675523618226208. Its totient is φ = 656759073275340.

The previous prime is 666141345750763. The next prime is 666141345750787. The reversal of 666141345750773 is 377057543141666.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 666141345750773 - 2¹⁶ = 666141345685237 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 (666141345750763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4691136237611 + ... + 4691136237752.

It is an arithmetic number, because the mean of its divisors is an integer number (168880904556552).

Almost surely, 2^{666141345750773} is an apocalyptic number.

It is an amenable number.

666141345750773 is a deficient number, since it is larger than the sum of its proper divisors (9382272475435).

666141345750773 is an equidigital number, since it uses as much as digits as its factorization.

666141345750773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9382272475434.

The product of its (nonzero) digits is 266716800, while the sum is 65.

The spelling of 666141345750773 in words is "six hundred sixty-six trillion, one hundred forty-one billion, three hundred forty-five million, seven hundred fifty thousand, seven hundred seventy-three".