666356337061417 has 4 divisors (see below), whose sum is σ = 672583966379856. Its totient is φ = 660128707742980.

The previous prime is 666356337061397. The next prime is 666356337061423. The reversal of 666356337061417 is 714160733653666.

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 a de Polignac number, because none of the positive numbers 2^k-666356337061417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666356337061427) 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 3 ways as a sum of consecutive naturals, for example, 3113814659059 + ... + 3113814659272.

It is an arithmetic number, because the mean of its divisors is an integer number (168145991594964).

Almost surely, 2^{666356337061417} is an apocalyptic number.

It is an amenable number.

666356337061417 is a deficient number, since it is larger than the sum of its proper divisors (6227629318439).

666356337061417 is a wasteful number, since it uses less digits than its factorization.

666356337061417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6227629318438.

The product of its (nonzero) digits is 205752960, while the sum is 64.

The spelling of 666356337061417 in words is "six hundred sixty-six trillion, three hundred fifty-six billion, three hundred thirty-seven million, sixty-one thousand, four hundred seventeen".