666475363 has 4 divisors (see below), whose sum is σ = 674911840. Its totient is φ = 658038888.

The previous prime is 666475357. The next prime is 666475399. The reversal of 666475363 is 363574666.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-666475363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666475333) 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, 4218120 + ... + 4218277.

It is an arithmetic number, because the mean of its divisors is an integer number (168727960).

Almost surely, 2^666475363 is an apocalyptic number.

666475363 is a deficient number, since it is larger than the sum of its proper divisors (8436477).

666475363 is an equidigital number, since it uses as much as digits as its factorization.

666475363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8436476.

The product of its digits is 1632960, while the sum is 46.

The square root of 666475363 is about 25816.1841293403. The cubic root of 666475363 is about 873.4968971694.

It can be divided in two parts, 66647 and 5363, that added together give a triangular number (72010 = T₃₇₉).

The spelling of 666475363 in words is "six hundred sixty-six million, four hundred seventy-five thousand, three hundred sixty-three".