666553357063311 has 4 divisors (see below), whose sum is σ = 888737809417752. Its totient is φ = 444368904708872.

The previous prime is 666553357063277. The next prime is 666553357063313. The reversal of 666553357063311 is 113360753355666.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 666553357063311 - 2²¹ = 666553354966159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666553357063313) 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, 111092226177216 + ... + 111092226177221.

It is an arithmetic number, because the mean of its divisors is an integer number (222184452354438).

Almost surely, 2^{666553357063311} is an apocalyptic number.

666553357063311 is a deficient number, since it is larger than the sum of its proper divisors (222184452354441).

666553357063311 is a wasteful number, since it uses less digits than its factorization.

666553357063311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222184452354440.

The product of its (nonzero) digits is 91854000, while the sum is 60.

The spelling of 666553357063311 in words is "six hundred sixty-six trillion, five hundred fifty-three billion, three hundred fifty-seven million, sixty-three thousand, three hundred eleven".